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We narrowed to 735 results for: RAN-1

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  1. Technical Design of a Western Blot

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    ...Tris-tricine 2.5–40 kDa Tris-tricine 30 V, 1 hour or 100 V, 1–2 hours Good separation, quality, and stability...Limited protein size range Tris-acetate 40–500 kDa Tris-tricine 150 V, 1–3 hours Good for higher...detection quickly (~1 minute), and have a linear response over a broad dynamic range that typically spans...lot to cover, so let's dive in!      Figure 1: The technical decisions to make when designing a ...assay. The most common options are 4 °C overnight or 1–2 hours at room temperature (RT). Most people choose...overnight at 4 °C and their secondary antibody for 1–2 hrs at room temperature, which allows them to reduce...weight of the proteins you’re interested in. Table 1 lists the most common types of gels for SDS-PAGE running...
  2. Droplet Digital PCR for AAV Quantitation

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    ...the range of the assay for a wide range of titers. We usually dilute our samples 1:6 million to 1:25 million...important to note that the dynamic range of the ddPCR is between 1 and 100,000 genome copies (GC) per ...In the image to the right, there is approximately 1 positive copy per microliter in the no template control...elongation time to 2 minutes and the denaturation time to 1 minute has been shown to increase droplet separation...diagnosis." Emerging microbes & infections 7.1 (2018): 1-9. PubMed PMID: 29691363. PubMed Central PMCID: PMC5915492...determine if your titers are within the expected range. We have also found that generating the standard...For these reasons, we are in the process of transitioning our titering method from qPCR to ddPCR. Droplet...
  3. Fluorescent Tagging of Endogenous Genes with SapTrap

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    ... 5’ and 3’ homology arm repair template (Fig. 1, Step 1). There is no need for PCR or cloning, as digestion...selectable marker, and connector to be released (Fig. 1, Step 2-3). Since donor plasmids of the same type ...correctly assembles the final targeting vector (Fig. 1, Step 4), and co-injection of the targeting vector...human cells. To use CRISPaint, users need 3 vectors:  1) a gRNA vector that targets the gene of interest, ... Tagging with Short Homology Donors.” Cell Rep.15(1) (2016):210-8. PubMed PMID: 27052166. Kunzelmann,...of the endonuclease Cas9 to create a DNA double stranded break (DSB) at a genomic site specified by a guide...tag. The two PCR reactions are then mixed and transfected along with a Cas9 expression vector. They can...
  4. Antibodies 101: Producing Recombinant Antibodies

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    ...materials have been washed away (Figure 1).      Figure 1: The steps of rAb production. Created ...Durocher Y. Transient Gene Expression in Suspension HEK293-EBNA1 Cells. Methods Mol Biol. 2018;1850:1-16. doi...Neuroscience Research. Curr Protoc Neurosci. 2020 Dec;94(1):e106. doi: 10.1002/cpns.106. PMID: 33151027; PMCID...doi: 10.1007/978-1-4939-8730-6_1. PMID: 30242676. Frenzel A, Hust M, Schirrmann T. Expression of recombinant...detection, and control. Int J Pharm. 2018 Oct 25;550(1-2):251-268. doi: 10.1016/j.ijpharm.2018.08.043. Epub...mammalian cells can perform human-like post-translational modifications that bacterial and most yeast ...be produced through a single or dual-plasmid transfection, depending on whether the heavy and light chain...
  5. Sleeping Beauty Awakens for Genome Engineering

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    ...perform gene transfer in vertebrates. The system is comprised of 2 components: 1) an SB transposase, the enzyme...References 1. Kowarz E, et al. Optimized Sleeping Beauty transposons rapidly generate stable transgenic cell...important for social and regulatory reasons. 1.) The transposon consists of a mirrored set of inverted repeats...T cells to target CD19. Immunol Rev. 2014 Jan;257(1):181-90. doi: 10.1111/imr.12137. PubMed. Find the ...contains the transposase gene (red) for expressing the transposase enzyme.2.) The transposase enzyme is ...which cuts the DNA.3.) The released transposon can now bind a strand of DNA with a TA dinucleotide (there...removal of the transposon; the plasmid is then degraded by the cell.4.) The transposase creates a double...
  6. Multiplex Genome Editing with CRISPR-Cpf1

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    ...For these experiments, cells were infected with a 1:1 ratio of two AAVs,  one expressing Cpf1 and the other...approaches have two main drawbacks: 1) Most rely on transfection of more than one vector to express the...comparison of Cpf1 vs. Cas9, see the table below. Table 1. Comparing the Cas9 and Cpf1 CRISPR Nucleases   ...leave them in the comments below.        References 1. Zetsche et al. "Multiplex Gene Editing by CRISPR–...the usual transfection drawbacks: transient expression and needing to work with a transfectable cell line...Cassettes transfection gRNAs expressed from a polycistronic transcript  Requires co-transfection of Cas9...Cassettes transfection gRNAs expressed from a polycistronic transcript Requires co-transfection of Cas9  ...
  7. Tips for Titering Your Lentiviral Preps

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    ...critical first step of a successful transduction experiment. References 1. Kutner, Robert H., Xian-Yang Zhang... for predicting gene transfer events." Genetic vaccines and therapy 2.1 (2004): 1. PubMed PMID: 15291957...type of assay is a clonal cell line known to contain 1 integrated copy of the qPCR target gene. Developing...Production, concentration and titration of pseudotyped HIV-1-based lentiviral vectors."Nature protocols 4.4 (2009... titration methods."BMC biotechnology 6.1 (2006): 1. PubMed PMID: 16836756. PubMed Central PMCID: PMC1534021...project forward, transductions should not be rushed into. Before you start any transduction, you should always...Primers targeting the transgene are also beneficial as they ensure that the correct transfer plasmid was used...
  8. Negative Can Be Positive: Open AAV Data with Addgene

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    ...across scientific disciplines. Scientific Data, 8(1), 1–11. https://doi.org/10.1038/s41597-021-00981-0 Wright...excellent at infecting our target neurons (Figure 1). However, this one set of experiments didn’t provide...yet none of that data was published.    Fig. 1: Testing of three different AAV serotypes (AAV1, 8...purification and formulation. Molecular Therapy, 12(1), 171–178. https://doi.org/10.1016/j.ymthe.2005.02.021...Stimulation. Frontiers in Human Neuroscience, 14(December), 1–12. https://doi.org/10.3389/fnhum.2020.578687 Additional...expressing neurons and GFP (green) to label neurons transduced by each serotype. Working at Addgene has ...answers hundreds of AAV questions every year on a range of issues related to AAV vectors, many from people...
  9. CRISPR Antimicrobials

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    ..., they used 1-2 CRISPR crRNAs targeting sequences found only in certain bacteria (Figure 1). Citorik et...from 50% to 11% in just 24 hours.   Figure 1: Single-phage strategies for bacterial CRISPR targeting...genome, and it carries CRISPR machinery targeting 1) the given resistance gene and 2) a second lytic phage...the fight against bacterial superbugs. References 1. Citorik, Robert J., Mimee, Mark, and Timothy K. Lu...Targeted Bacterial Population Editing.” Cell Syst. 1(3):187-196. (2015). PubMed: PMID 26973885. Additional...antibiotic resistance using multiple approaches. Major restaurant chains including Chipotle and Panera Bread have... joining machinery, so a CRISPR-induced double-stranded break (DSB) in the genome is lethal. If this DSB...
  10. Plasmids 101: Gateway Cloning

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    ...References 1. Chee JY, Chin CF (2015) Gateway Cloning Technology: Advantages and Drawbacks. Clon Transgen 4:138...recombination sites (attL-left- and attR-right-, Figure 1). Under certain conditions, the attL and attR sites...regeneration of attP and attB sites.   Figure 1: Lambda phage integration and excision reactions. ...expression of the human KRAS gene in mammalian cells. STEP 1: Generate an Entry Clone There are a few different...could use a vector like pLenti CMV Puro DEST (w118-1) or the doxycycline-inducible pLIX_403. The chosen...the generation of the expression construct in only 1 day, as opposed to 2+ days with traditional restriction...sequencing or restriction digest! Then, you can transform or transfect the cells that you want to use for your...
  11. HA Frankenbody, a New Imaging Tool to Visualize Single Molecules and Nascent Peptides

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    ...HA-tagged proteins in vivo. Nature Communications, 10(1). PubMed PMID: 31270320. PubMed Central PMCID: PMC6610143...fused to a fluorescent protein. “Frankenbody,” like the infamous frankenstein, was constructed by grafting...called this probe the HA frankenbody (Zhao et al., 2019).  To develop HA frankenbody, the Stasevich lab tested...can you do with the HA frankenbody? Another large advantage of the HA frankenbody is that it remains bound...also proved that HA frankenbody can be effectively used to track single mRNA translation in U2OS cells. HA...acids, thus it is translated quickly by the ribosome. This feature provides HA frankenbody the ability to...properly once inside cells.  Developing the HA frankenbody To combat the issues with these antibody based...
  12. Getting to Know Expansion Microscopy

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    ...protocols. A typical ExM protocol (Fig. 1) follows this structure: Step 1: fix (and maybe label) your sample...microscopy. Nat Biotechnol 1–12. https://doi.org/10.1038/s41587-022-01546-1  Mikhaylova M, Cloin BMC, ...just adding water.)  Step 5: Image   Figure 1: The ExM process allows you to physically magnify ...16:71–74. https://doi.org/10.1038/s41592-018-0238-1  Klimas A, Gallagher BR, Wijesekara P, et al (2023...jam packed with everything needed for synaptic transmission, are right around 250 nm, making it difficult...pre-expanded samples can sometimes take on a fragmented appearance post-expansion, but that doesn’t mean we should...brief history and new avenues. Philosophical Transactions Royal Soc 380:20210110. https://doi.org/10.1098...
  13. Viral Vectors 101: What is a Virus (and a Viral Vector)?

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    ... an envelope are called enveloped viruses (Figure 1). Like bacteria, only a tiny fraction of viruses are...are pathogenic (Balloux & van Dorp, 2017). Figure 1: A non-enveloped virus (left) and an enveloped virus...create far safer viral vectors that can be used in BSL-1 or BSL-2 labs. Viral vectors are viruses that have... https://doi.org/10.1016/B978-0-12-800947-5.00004-1 Taylor, M. W. (2014). What Is a Virus? In M. W. Taylor...reverse transcribe their gRNA into DNA, which is then transcribed into mRNA before being translated into ...genome types that can be either double stranded (ds) or single stranded (ss) (ie, dsDNA, ssDNA, dsRNA, positive... of virus. RNA genomes can be transcribed into mRNA, directly translated into proteins, or, in the case...
  14. PiggyBac-ing Through the Genome Editing Field

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    ...Correct Path.,” J. stem cell Regen. Biol., vol. 1, no. 1, Jan. PubMed PMID: 26702451. PubMed Central PMCID... 2005 [1]. Like other transposons, piggyBac™ has two components, a transposon and a transposase. The piggyBac...integration [8].   Figure 1: Mechanism of the piggyBac™  transposase/transposon gene modification system...limit [1]. The piggyBac™ technology can be used for numerous applications, including transgenesis, gene-trap...The predicted frequency of ‘TTAA’ in the genome is 1 in every 256 base-pairs of DNA sequence, making it...technologies and strategies for their projects. References 1. L. E. Woodard and M. H. Wilson, “piggyBac-ing models...titrating the transposase to transposon ratios. High ratios of transposase to transposon result in a greater...
  15. Viral Vectors 101: Virus Safety

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    ...including yourself as the researcher.   Figure 1: Separation of retroviral packaging components onto...these reasons, AAV is usually classified as a BSL-1 safety level. Adenovirus is similar to AAV in that...lab coats are either recommended or required in BSL-1 and required in BSL-2 labs. When working with lentivirus...required whenever there’s a splash or spray risk in BSL-1. In BSL-2 labs, eye protection is required any time...isopropyl alcohol, 0.5% peracetic acid, 10% bleach, or 1% iodine are useful. Some organizations or cities may...looks like the genetic cargo in one plasmid (the transfer plasmid), the envelope (Env) gene on a separate... plasmid). Viral production then proceeds by transfection of all three plasmids into a producer cell line...
  16. Plasmids 101: FLEx Vectors

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    ...coding sequence in the antisense orientation (Figure 1, top). The entire DNA cassette would be flanked by...include both Cre and FLP recombinases.   Figure 1 (modified from Schnutgen et al. Nat Biotech 2003):...identical sites on one end of the DNA fragment (Figure 1, middle). A second recombination event then excises...between the identical loxP or lox511 sites (Figure 1, bottom). Since only one loxP and lox511 site will...genOway press release for more information. References: 1. Schnütgen F, Doerflinger N, Calléja C, Wendling O...sites directs the Cre recombinase to invert, translocate, or excise a DNA fragment. The availability of...infected and would have the potential to express the transduced reporter gene. Generating a FLEx switch to control...
  17. Some Like it Hot: Thermostable GeoCas9

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    ...buffer at temperatures ranging from 25-80 °C. Activity is expressed as Kcleave (min-1). SpCas9 has maximum...Cells? Yes Yes Longevity in Serum?* No Yes Table 1. Comparing SpCas9 and GeoCas9. *For in vitro Cas9 ...GeoCas9 is active at high temperatures Figure 1: Thermostability of SpCas9 vs GeoCas9. SpCas9 or GeoCas9...outperformed SpCas9 at high temperatures. See Figure 1 for a summary of the experimental results. GeoCas9...). G. stearothermophilus grows at temperatures ranging from 30-74 °C, with an optimal growth temperature...or G) Spacer Length 20 nt 22 nt Temperature Range for Optimal Activity 35 - 45 °C 50 - 70 °C Genome...Harrington et al tested GeoCas9’s editing skills by transfecting HEK293 cells with GeoCas9 or SpCas9 RNP’s and...
  18. Improving Transduction Efficiency with Exosome AAVs

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    ...vector-exosomes), exosome AAVs, or exo-AAVs (Figure 1). The researchers discovered that these particles ... are often found with cellular exosomes, small membrane vesicles or microvesicles (approx. 40 - 150 nm... diameter) that are secreted from the cellular membrane into the culture medium. AAV particles are either... vectors. They found that they have a higher transduction efficiency, i.e. the same number of AAV particles...to modify it to improve yields. For example, transfecting the producer cell line with an expression vector...proteins, nucleic acids) which possibly improve transduction properties. György and colleagues found that...that the association of AAV particles with membrane vesicles protects them from antibody recognition and...
  19. The Importance of High Titer for AAV Transductions

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    ...methods to improve AAV production.     References 1.Clark, K. Reed. "Recent advances in recombinant adeno-associated... The higher the titer, the better. AAV transport and transgene expression It’s clear that we need high...be required. For example, retrograde AAV gets transported up the cell’s axon. While the mechanism for this...yet fully understood, we can imagine that this transport is probably not 100% efficient. So the few AAV... higher retrograde AAV titers for successful transduction. In another example, neuronal gene expression..., fewer channel proteins are required for the transduced cell to become light responsive than fluorescent...process of generating viral particles. Limit tube transfer - the fewer opportunities your viral particles...
  20. CRISPR 101: Non-Homologous End Joining

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    ...842 . https://doi.org/10.1016/j.molcel.2014.08.002 Ran FA, Hsu PD, Lin C-Y, Gootenberg JS, Konermann S, ...Last updated Sept 1, 2020. This post was contributed by David Wyatt and Dale Ramsden, UNC at Chapel Hill...the course of repair by NHEJ are typically small (1-10 bp) but extremely heterogeneous. There is consequently... single strand break; when two such breaks are introduced near each other, in opposite strands. This “...Cas9 can be easily programmed to make a DNA double strand break (DSB) in the genome wherever the user chooses....org/10.1371/journal.pgen.1000683 Bétermier M, Bertrand P, Lopez BS (2014) Is Non-Homologous End-Joining...Giovannangeli C, Jasin M, Brunet E (2014) Chromosomal Translocations in Human Cells Are Generated by Canonical Nonhomologous...
  21. Viral Vectors 101: Pseudotyping

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    ...tail.   Figure 1: Lentiviral production uses three plasmids: (1) The transfer plasmid, (2) the envelope... 2017)  Table 1 (Gutierrez-Guerrero et al., 2020) Table 1 (Cronin et al., 2005)     References and ... on different viral membranes, tropism, and advantages and disadvantages: Table 1 (Joglekar et al., 2017... specific purposes as described previously (Table 1, Gutierrez-Guerrero, et al, 2020). Because retrovirus...lentiviral vector to be transported retrograde and also has higher neuronal transduction efficiency and a better...virus to either restrict or broaden the host cell range (tropism). Pseudotyping is only done on enveloped...plasmid, and (3) the packaging plasmid. These are transfected into target cells which produce lentiviral particles...
  22. Tips and Tricks for Using Golden Gate Modular Cloning (MoClo)

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    ... process. Also refer to Figure 1 for a visual overview! Figure 1: General overview of the MoClo... multiple colonies after each transformation. This could be as few as 1–2 colonies if you’re an experienced...part from an Addgene MoClo kit, to construct a Level 1 vector with a promoter and terminator flanking the...acceptor (bottom) for CDS1 parts. (B) Example Level 1 assembly. The choice between different Level 0 vectors...properly. Do this sequentially for your Level 0, Level 1, and Level 2 assemblies using the plasmid sequence... after each transformation and/or use different E. coli strains with higher transformation efficiency....vector with two other independently regulated transcription units. Created with BioRender.com.   Planning...
  23. Controlling for Off-target Effects with a New Genome-wide CRISPR Screen Design

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    ...holds true in genome-wide screens.   Figure 1: Summary of the advantages of the new approach to ... in both screens, with the growth screen having a 1% false discovery rate and identifying >88% of previously...in Morgens et al. contains three types of guides: 1) targeting guides (blue), which target all protein-coding...off-target sites was profiled. Guides with exact or 1-bp mismatch off-targets had greater toxicity than ...characteristics that influence gRNA off-target activity: 1) mismatches closer to the PAM are less tolerated than.... When comparing the toxicity of guides that have 1-bp mismatch off-target sites, short guides had reduced...Knockout Library are available from Addgene! References 1. Morgens, David W., et al. "Genome-scale measurement...
  24. Click Biology: How to Click and Play to Explore Biology

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    ...the best performance in the most contexts (Figure 1). Together the features with optimal biological performance...described as Click Biology (Howarth, 2025). Figure 1: Modular assembly tools, alongside criteria for Click...tools can be found in Addgene's repository (Table 1). Figure 2: Adding function to My Favorite ...coupling. Created with BioRender.com.   Table 1: A handful of Click Biology tools available at Addgene... intein; N-terminal CLm and C-terminal Aes gp41-1 Split inteins A small, fast split intein SpyTag003...of the coupling system include: Wide fusion-tolerance — Click Biology tags should be similarly useful...parts in the micromolar or nanomolar concentration range. Reactions to happen under lots of conditions ...
  25. CRISPR 101: Homology Directed Repair

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    ...Genome engineering using the CRISPR-Cas9 system. Ran FA, et al. Nature Protocols Nov;8(11):2281-308; (2013)...oligodeoxynucleotides)) are commonly used for smaller modifications (~1-50 base pairs). Small edits require as little as 30...Easi-CRISPR was shown to increasing editing efficiency from 1-10% with dsDNA to 25-50% with ssODNs in mouse models...ribonucleoproteins. Quadros RM, et al. Genome Biol. 18(1); (2017). PubMed.  Additional Resources on the Addgene...dHJs are four-stranded branched structures that form when elongation of the invasive strand “captures” and...lesion results from breakage of both DNA strands - a double-strand break (DSB). DSBs can be caused by intracellular...proteins required for strand invasion and a primer for DNA repair synthesis. The ssDNA strand then displaces ...
  26. Using AAV for Neuronal Tracing

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    ...). Analysis of transduction efficiency, tropism and axonal transport of AAV serotypes 1, 2, 5, 6, 8 and...serotypes 1, 8 and 9 share conserved mechanisms for anterograde and retrograde axonal transport. Hum Gene.... (2009). Comparison of transduction efficiency of recombinant AAV serotypes 1, 2, 5 and 8 in the rat ... Brain Res 406(1-2), 317-321. PubMed PMID: 2436717. Towne, C., Schneider, B.L., Kieran, D., Redmond, D.E.Jr...but also others including pseudorabies virus type 1, vesicular stomatitis virus (VSV; Beier et al., 2011...Skeletal Muscle AAV1, AAV6, AAV7, AAV8, AAV9 Table 1: Common AAV Serotypes and their target tissues (adapted... serotypes capable of entering neurons (see table 1)(Choi et al., 2005; Taymans et al., 2007; Howard et...
  27. Adeno-associated Viruses (AAVs) for Genome Editing

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    ...infection, gene targeting vectors with relatively short (1 kb) homology arms underwent homologous recombination...sequences of interest to cells with efficiencies of 1-40% after G418 selection (Kohli et al 2004, Kim et...with polylinkers for the addition of gene-specific 1 kb homology arms flanking a FLOXed neoR gene. pAAV-SEPT-Acceptor...since it routinely generates knockin efficiencies of 1-40% with G418-selected clones. However, there are ...efficiency of gene editing is occasionally less than 1%, and virtually never exceeds 40%. While this is comparable...gene inactivation in human cancer.     References 1. Russell, David W., and Roll K. Hirata. "Human gene...is composed of single stranded DNA, which is particularly well suited for strand invasion, a key step ...
  28. Pathways Over Time Plasmids Engage Students in Functional Genomics Research

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    ...authentic research experiences to undergraduate students (1, 2), but educators face significant challenges in ...6). Methionine synthesis in S. cerevisiae (Figure 1) occurs through a well-characterized pathway with ...sequences for ten different MET/Met genes (Figure 1) from the two yeast species into the pYES2.1/V5-His...selected from different parts of the Met pathway (Fig. 1). In addition to the complementation experiments that...about Clare at the Biology Dept. site.  References 1. American Association for the Advancement of Science...students first transform the S. cerevisiae met deletion strains and then isolate transformed strains on media...organism into overexpression plasmids. Students next transform deletion strains from the reference organisms ...
  29. Optimizing Donor DNA for Enhanced CRISPR Genome Editing

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    ...the four strands of the cleaved duplex, while the fourth strand (the released strand in Figure 1 below) ...complementary ssDNA molecules in vitro. Figure 1: Cas9 binding to the cleaved DNA duplex. Image from...allowed sequence replacement rates of approximately 1%. This is by no means a large number, but it was attained...who worked on this publication:         References 1. Richardson, Christopher D., et al. "Enhancing homology-directed...discovered that single stranded donor DNA: Complementary to the released strand, 127bp in length, With...single or double stranded donor DNA with other design parameters. Example single stranded donor DNA and ...presented in Figure 2. Figure 2: Single-stranded donor DNA interaction with the Cas9-DNA duplex...
  30. Which Fluorescence Microscopy Technique is Best for Me?

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    ... microscopy contrast technique in modern biology (1). When performed correctly, fluorescence microscopy...relatively thicker three dimensional sample (see Figure 1); similar to an MRI or CT scanner. This is accomplished... the resolution of a light microscope (see Figure 1). What microscopy technique should I use for my experiment...new sample I always start by asking two questions: 1) Is the sample dynamic or static? 2) Is the sample...of modern day fluorescence microscopes (see Table 1). Thin dynamic samples Ex: monolayers of live cells...excitation light can push imaging depths closer to 1 mm. Traditionally, 2-photon has been a very slow imaging...manufacturers have similar information References 1. Lichtman JW, Conchello JA. Fluorescence microscopy...
  31. 500,000 Plasmids Shipped and Counting!

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    ...here at Addgene – 500,000 plasmids shipped! That's a 1/2 million plasmids sent to happy scientists around...start out at our Cambridge office – previously at 1 Kendall Square, but newly relocated to 75 Sidney Street...Have a question? Email: [email protected] Call: +1 (617) 225-9000         ...Addgene's lab. We ship individual plasmids as transformed bacteria in stab culture format. Our lab team... and collaborations with institutions and tech transfer offices that facilitate MTAs. The great feedback...
  32. Twenty Years of Sharing: Expanding Accessibility

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    ...our repository to an amazing 111 countries (Figure 1)! But while we were making the materials available...accessibility varied country to country.   Figure 1: Number of countries Addgene distributes to per year...date, we have partnered with six distributors (Table 1), in China, Korea, Japan, Brazil, India, and Mexico...material is right for their experiment.     Table 1: Most popular guides, protocols, and collections of...in 2023, from visitors in 218 countries. In Table 1, you can see our most popular educational resources... execute a step can provide needed clarity (Table 1). Our most popular video, however, is “What is a Plasmid... package stays in transit for a certain number of days and tracking average transit time for each courier...
  33. From Lab Bench to Leadership: Transitioning into Management as a PhD

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    ...pitfalls? Here's what you need to know.   Figure 1: Management can seem a mystery at first! Image used...Understanding the transition While a PhD equips you with exceptional technical skills, transitioning into management...   Strategies for a successful transition To successfully transition into a managerial role, it's essential... most pivotal decisions many PhDs face when transitioning from academia to industry is whether to stay...career trajectories within the industry, but the transition wasn’t easy - I had to reinvent myself and redefine...d like to share below. Common pitfalls in the transition (what I wish I knew before experimenting on myself...being a great scientist doesn’t automatically translate to being an effective manager. Mismanaging (no...
  34. Deep Dive: qPCR

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    ...Issue 19, 1 October 2000, Pages 3752–3761, https://doi.org/10.1093/nar/28.19.3752Wong M; Medrano J. Real-time...relatively easy to multiplex (Thellwell, 2000). See Table 1 for a comparison of features of several commonly used...in primer Yes Yes Agarose gel Table 1: Features of various qPCR chemistries. Adapted from...show multiple peaks.    (a) (b)  (c)   Fig. 1: Melt curves showsing (a) a single peak, indicating...changes in ΔΔCT are represented by RQs between 0 and 1. Flipping your experimental and control values during...see this fold change as a positive difference (RQ>1), which may be easier to conceptualize. Just remember... in Molecular Biology, vol. 1160, DOI 10.1007/978-1-4939-0733-5_3, © Springer Science+Business Media New...
  35. Celebrating Outstanding CRISPR/Cas9 Achievements at the Dr. Paul Janssen Award Dinner

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    ...minutes, which was fun to watch. A simpler 1 protein - 1 RNA system Drs. Dounda and Charpentier met at...to direct cleavage the result was a simpler 1 protein - 1 RNA system.  Dr. Charpentier advocated for the...this type of experimentation to the eventual translation to the clinic and cures. There is no doubt that...
  36. Making CRISPR Plasmids Using Fragmid

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    ...building it! Table 1 has a list of Fragmid destination vectors currently available. Table 1: Fragmid destination...components on the Fragmid website.   Figure 1: (Top) Schematic overview and timeline of the Golden... CRISPR vector the Fragmid way!    Figure 1: Selecting your vector type on the Fragmid website...components available will depend on your answers in step 1, so you’ll only be able to select components that ...Gate cloning, perform an exonuclease cleanup, transform, plate, and pick. In short, the Fragmid system...AAV pRDA_889 (ITRs from AAV2) Mammalian Transposon pRDA_757 (Piggybac; constitutive expression...   Drosophilia Plasmid pRDB_053 (for transgenic flies; gypsy insulator sequences; white + selectable...
  37. Truncated gRNAs for Regulating Gene Expression

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    ...while its nucleolytic activity is eliminated (Fig. 1) (1, 3). The gRNA can be further modified by incorporation... Podcast Interview with Alex Chavez Figure 1: Schematic of native (nuclease-competent) Cas9 interacting...which Cas9 protein is directed to which target site (1). Although this is possible, this strategy suffers...sequence or regulating gene expression.     References 1. Esvelt, Kevin M., et al. "Orthogonal Cas9 proteins...which cleaves one strand of DNA upon binding the protospacer. The resulting double strand break (DSB) stimulates...two catalytic domains, HNH and RuvC, cleave DNA strands complementary and non-complementary to the gRNA... binds the target site, but does not cut either strand of DNA. Traditional Cas9 regulators In addition...
  38. Deep Dive: Fixing and Permeabilizing for Immunofluorescence

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    ...preventing your primary antibody from binding (Fig.1). The level of cross-linking that occurs depends on...proteins, which could disrupt your target epitope (Fig. 1). So, while organic solvents may improve antibody ...thing depending on your experiment.   Figure 1: Choice of fixation method impacts antibody binding...New York, pp 299–311. https://doi.org/10.1007/978-1-4939-8935-5_26  Rolls G (2022) Process of Tissue Fixation...www.leicabiosystems.com/us/knowledge-pathway/fixation-and-fixatives-1-the-process-of-fixation-and-the-nature-of-fixatives...and membrane integrity (Fig. 2). For example, saponin interacts with cholesterol in cell membranes and...can lose membrane-associated proteins, but it is better at permeabilizing organellar membranes. Created...
  39. Viral Vectors 101: AAV Serotypes and Tissue Tropism

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    ...and enhances astrocyte-directed transduction. Nature Communications, 14(1), 3792. https://doi.org/10.1038...Facilitate Efficient Binding and Transduction by Adeno-Associated Virus Types 1 and 6. Journal of Virology,...them to target particular cell types. Figure 1: Diagram of AAV components. Created with BioRender.com...depends on your choice of promoter/enhancer. Table 1: AAV capsids and receptors. Capsid Primary receptor...required)2 Human fibroblast growth factor receptor 1 (FGFR1)3 αVβ5 and α5β1 integrins3 Hepatocyte growth...structure of AAV2, so they are formally called rAAV2/1, rAAV2/2, and so on, although we often use abbreviated...utilizing various AAV serotypes. Scientific Reports, 15(1), 20927. https://doi.org/10.1038/s41598-025-05518-...
  40. A Career in Grants: How To Become a Grant Professional

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    ... successful and meaningful career in the grants profession: 1. Build on your existing skills & passion...Associates, Inc., a national grant consulting firm, and Smartegrants, a grant professional development firm... the field of grants. What is a grant professional?  In the past 5-10 years, the Grants Profession has...readiness, identify grant opportunities, secure grant awards, and manage grant projects and funds. You will... for grants, the amount of grant funds available and the increasing regulatory process for grants has ...become a grant professional? Employment opportunities for those with expertise in grant writing, grant management...as a Grant Professional to mentor and coach you. There are many grant consultants who offer grant training...
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