We narrowed to 672 results for: abo.1
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TypeBlog Post...transcription activation system co-opted from yeast (1). It is a Drosophila geneticist’s main workhorse to...he still reads “#” as a “pound symbol”. References 1. A. H. Brand, N. Perrimon, Targeted gene expression... A Fly Geneticist’s Swiss Army Knife, Genesis 34, 1–15 (2002).PubMed PMID: 12324939. 3. S. E. McGuire,...Versatile Toolkit for Gene Expression in Drosophila, 3, 1–10 (2015). PubMed PMID: 21356876. 5. J. Chow, Z. Marka... use the Gal4/UAS system, and you can read more about them in review articles (2–4). You can also take...
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Plasmids 101: Mammalian Vectors
TypeBlog Post...premature chain termination 1-10 ug/mL Zeocin Sh bla HeLa, NIH3T3, CHO, COS-1, 293HEK, Jurkat T cells Complexes...expressing the Epstein–Barr virus (EBV) nuclear antigen 1 (EBNA1) or the SV40 large-T antigen (293E or 293T ...Concentation*** Blasticidin bsd HeLa, NIH3T3, CHO, COS-1, 293HEK Inhibits termination step of translation ...within 3-5 days and resistant colonies appear in about 10-14 days depending on how quickly your cells divide... -
Treating Muscular Dystrophy with CRISPR Gene Editing
TypeBlog Post...X-linked recessive disorder affecting approximately 1 in 5000 males. DMD is caused primarily by frameshift... applicable to 80% of DMD patients. Figure 1: Exon skipping strategies for Duchenne muscular dystrophy...needed. First, CRISPR delivery must be optimized to: 1. Reach a high percentage of muscle cells throughout...also be closer than we might expect. References 1. Kaiser J. CRISPR helps heal mice with muscular dystrophy...neurogenetic diseases. Nucleic Acid Ther. 2014 Feb;24(1):69-86. PubMed PMID: 24506781. PubMed Central PMCID...);186-91. doi: 10.1038/nature14299. Epub 2015 Apr 1. PubMed PMID: 25830891. PubMed Central PMCID: PMC4393360...estimated that very little dystrophin correction (about 4%) is needed to see muscle improvement, with only... -
9 Tips to Achieve Success in Academia
TypeBlog Post...leading professors for their top 3 tips. Tom Ellis 1. Keep up with the literature. He recommends setting...research and with getting published.” Connie Cepko 1. Work hard. There will be periods when opportunities...time comes to work with full force. George Church 1. “Initial and sustained motivation is a huge component... passionate about. Check out my previous post if you're looking for more information about the benefits...every spurious result under the sun. Academia is about convincing results, and nothing is more convincing...is your passion? Even if no one else is excited about it, distinguish yourself with this passion. “Love...presentations and of course, networking and collaborating.” Getting out of the lab also “opens the student's... -
Plan Your Experiment
TypeGuide...sequences containing a G nucleotide at position 20 (1 bp upstream of the PAM) may be more efficacious than...population. Some cells may be wild type due to either (1) a lack of gRNA and/or Cas9 expression or (2) a lack... in vitro and in vivo. Nature Biotechnology . 33 (1), 73–80. PMID: 25357182...components to make lentiviral particles (for details about lentivirus, see our Lentivirus Guide ) Stable, tunable...when carrying out CRISPR experiments. Read more about how to design your gRNA . Browse Plasmids: gRNAs...to optimize your delivery conditions. Learn more about CRISPR delivery in mammalian systems . Validate ... -
Rosella: A Fluorescent pH-Biosensor for Studying Autophagy
TypeBlog Post...’s fused to the C-terminus of DsRed.T3. See Table 1 for a summary of Rosella’s excitation and emission...fluorescence Rosella emits based on its localization. Table 1: Summary of Rosella’s excitation and emission spectra... variants are available from Addgene. References 1. Rosado, C., Mijaljica, D., Hatzinisiriou, I., Prescott...single fluorescent biosensor. Scientific Reports,5(1). doi:10.1038/srep12397. PubMed PMID: 26215030. PubMed...information about the contents of the autophagosome nor does it provide information about what is being...higher pH of the vacuole. Read on to learn more about prior methods for studying autophagy and how Rosella... (as opposed to giving more fine-grained detail about what proteins or organelles are being degraded) ... -
Three Key Considerations for Precise Neuronal Targeting Using AAV Technologies
TypeBlog Post...from the paper for designing experiments with AAV: 1. Getting your viral vector into your cell of interest... administration routes for neuroscience see Table 1 from the paper. 2. Manipulate your cell of interest...information from a region. In the example shown in Figure 1, injected retrograde AAVs at one location result in...Learn more about retrograde AAVs Resources on Addgene.org Read our AAV guide Learn more about our viral... -
Plasmids 101: Modular Cloning Applications and Kits
TypeBlog Post...within the mitochondrial matrix. Figure 1: A chart with MoClo kit recommendations for different...Traditional Biology.” ACS Synthetic Biology, vol. 5, no. 1, American Chemical Society (ACS), 4 Nov. 2015, pp...., vol. 4, no. 9, American Chemical Society (ACS), 1 May 2015, pp. 975–86. Crossref, https://doi.org/10.1021...Yeast Mitochondria.” BMC Biotechnology, vol. 17, no. 1, Springer Science and Business Media LLC, 13 Nov. ...Editing in Plants.” BMC Plant Biology, vol. 20, no. 1, Springer Science and Business Media LLC, 23 Apr. ...Arabidopsis Mutants.” The Plant Journal, vol. 106, no. 1, Wiley, 25 Mar. 2021, pp. 8–22. Crossref, https://...Cloning Platform.” Scientific Reports, vol. 9, no. 1, Springer Science and Business Media LLC, 12 July ... -
PRIDICT: Predicting Efficiencies of Prime Editing Guide RNAs
TypeBlog Post...evaluate all of the pegRNAs in one experiment (Figure 1). Through this method, we found key determinants of...diverse edit types and cell contexts. Figure 1: High-throughput screening of pegRNA efficiency and...Article 3. https://doi.org/10.1038/s41576-022-00541-1 Kim, H. K., Kim, Y., Lee, S., Min, S., Bae, J. Y.,...DNA repair determinants. Nature Biotechnology 2023, 1–11. https://doi.org/10.1038/s41587-023-01678-y Li,...editing systems in multiple cell types. Cell, 186, 1–17. https://doi.org/10.1016/j.cell.2023.03.034 Resources... al., 2023). We trained our models in close collaboration with the Krauthammer lab (University of Zurich... -
Fluorescent Proteins 101: Fluorescent Protein Timers
TypeBlog Post...that have now become hallmarks of ideal FP timers: 1. Ratiometric determination of expression time The ...the FT series matures from blue to red (see Table 1 for emission and absorption spectra). Subach et al...times and varied blue-red maturation times (Table 1). These separate proteins should be useful for monitoring...cellular events occurring at varied time scales. Table 1: Monomeric FP Timers and Associated Plasmids from ... know in the comments section below! References 1. Terskikh, Alexey, et al. ""Fluorescent timer": protein...Additional Resources on the Addgene Blog Learn More About Fluorescent Protein Aggregation Catch Up On Your... -
3 Tips to Improve HDR Efficiency for CRISPR Editing in Human Cells
TypeBlog Post...events by HDR can be generated more efficiently by (1) improving editing accuracy by preventing re-editing...specifically incorporate homo- or heterozygous mutations. 1. Increasing HDR accuracy with CRISPR/Cas-blocking ...targeted alleles when gene editing. Figure 1: Techniques to improve editing efficiency. But...provided by blocking mutations. Essentially, you: Step 1 - Introduce the blocking mutation together with the...developing novel iPSC-based model systems. References 1. Cong, Le, et al. "Multiplex genome engineering using...mutations When thinking further about the distance relationship described above, we realized that, in addition...efficiency already drops by half and after only about 30 bp, it is no longer feasible to incorporate mutations... -
Viral Vectors 101: Parts of the AAV Packaging Plasmid
TypeBlog Post... The three VP proteins assemble into capsid at a 1:1:10 ratio (VP1:VP2:VP3). There are eleven naturally...closer look at the rep and cap genes. Figure 1. The RepCap plasmid and its products. Created with...engineered Learn about the parts of the AAV transfer plasmid Resources on Addgene.org Learn about AAV Find ...plasmid! Check out this blog post to learn more about the AAV transfer plasmid! References: Naso MF... -
Plasmids 101: Modular Cloning
TypeBlog Post.... Level 1: Assembly of multiple Level 0 parts into TUs. Level 2: Assembly of multiple Level 1 TUs into...: promoter, gene, and terminator. Fig 1. MoClo enables individual parts to be assembled into... peptide can easily be tested by generating Level 1 TUs with unique promoters, and the ideal phosphatase...specifically refers to the organizational schema described above, and not any particular cloning technique. Though...imagine, there is an array of distinct goals within metabolic engineering, synthetic product production, and...MoClo strategy and kit if you want to learn more about this cloning technique! Many thanks to Rob Hurt ... -
Delivery Methods for Generating iPSCs
TypeBlog Post...) element and the cis-acting EBNA-1 from Epstein-Barr virus. EBNA-1 binds oriP and allows for replication...using? Let us know about your iPSCs experiences in the comments below! References 1. Sano, Masayuki, ...Difficult to purify reprogramming proteins. Table 1: Key Features of Different Methods for Generating ...-based expression requires serial transfection of 1 or 2 plasmids that express the reprogramming factors... Replicating oriP/Epstein-Barr nuclear antigen-1 (EBNA1) based episomes: These plasmids carry the origin...method Most iPSC research falls into two categories: 1) studies focused on better understanding the mechanisms...Methods figures were adapted from this reference. 1. Malik, Nasir, and Mahendra S. Rao. "A Review of the... -
Plasmids 101: Using Transposons in the Lab
TypeBlog Post...Transposons: The jumping genes. Nature Education 1(1):204. https://www.nature.com/scitable/topicpage/transposons-the-jumping-genes... They transpose by a ‘copy-paste’ mechanism (Fig. 1). They first copy themselves as RNA transcripts and...their host’s genome. There are two types of Class 1 TEs: those with long terminal repeats (LTRs) and those...reverse transcriptase activities. Figure 1: Overview of retrotransposon transposition. Retrotransposons...CRISPR-Cas system. This system has four major components: 1) a CRISPR RNA (crRNA), 2) four proteins (TniQ, Cas8...Addgene blog Learn about the INTEGRATE system for bacterial genome engineering Read about the Sleeping Beauty...DNA transposons are most commonly used in the laboratory for genome manipulation. When transposons are... -
CRISPR Protocol for Genomic Deletions in Mammalian Cell Lines [Video]
TypeBlog Post... joining repair (NHEJ) [1]. Our initial work was with TALENs, in collaboration with the Porteus lab [2...from the University of Pennsylvania. References: 1. Lee HJ, Kim E, Kim JS. Targeted chromosomal deletions...using zinc finger nucleases. Genome Res. 2010 Jan;20(1):81-89. PubMed. 2. Bauer DE, Kamran SC, Lessard S,...PhD student at Harvard Medical School in the laboratories of Stuart Orkin and Daniel Bauer. He received... -
RNA Interference in Plant Biology: New Tools for an Old Favorite
TypeBlog Post...dsRNA via an RNase III enzyme named Dicer (Figure 1). The plant kingdom has expanded its repertoire of...in the biogenesis of different small RNAs (Figure 1). These siRNAs can exert their gene silencing effect...modifications of complementary gene sequences (Figure 1). As a result, gene silencing can be easily induced...the ease of use in dsRNA applications. Figure 1: Schematic of an RNAi-inducing transgene. Typically...complementary to your gene target as inverted repeats (Figure 1). With this technique, multiple genes can be simultaneously...selection of plants undergoing RNAi, and LIIbeta F 1-2 RNAi, which allows assembly of intron-spliced hpRNAs... “transitivity,” calls into question any claims about specificity of a given RNAi technique. While transitivity... -
Fluorescent Proteins 101: Photoactivatable Fluorescent Proteins
TypeBlog Post...discovered such as Kaede and PS-CFP2 (see Table 1). Table 1: Properties of Selected Irreversible Photoactivatable...(2008): 1-38. PubMed PMID:18647110. Additional Resources on the Addgene Blog Read More about Fluorescent...) by mutating Threonine 203 to Histidine (T203H) (1). wtGFP normally contains a mixed population of neutral...in fluorescence when illuminated with blue light (1). Similar to PA-GFP, scientists later developed red...fixation conditions to preserve cellular structures (0.5-1% osmium tetroxide). These conditions destroy most ...with extraordinary molecular detail. References 1.Patterson, George H., and Jennifer Lippincott-Schwartz...emitted, making it easier to capture a clear image above background. The majority of PA-FPs come in 2 flavours... -
The Materials Science of Optogenetics Experiments
TypeBlog Post... different steps and materials required for each [1, 2]. This protocol [3] provides, in exquisite detail...follow him on Twitter @derekpsimonphd. References 1. Gutierrez DV, et al. Optogenetic control of motor...manipulation of neural circuits. Nature protocols. 2012;7(1):12-23. doi: 10.1038/nprot.2011.413. PubMed PMID: ...freely moving mice. Neuroscience research. 2011;70(1):124-7. doi: 10.1016/j.neures.2011.01.007. PubMed ...distance so ideal implant placement should be about 0.4-0.5mm above the site of your stimulation. The scatter...scatters a great deal once it enters tissue, placement above the site of stimulation guarantees that the majority...instead). Laser stimulation In the video above, Channelrhodopsin 2 (Chr2) has been expressed in... -
Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells
TypeBlog Post...following four components into 293T cells. Figure 1: The key components of Nanoblades. Image from Mangeot...protein. A single Nanoblade particle can be loaded with 1-4 different gRNAs. Viral envelope proteins To alter... between ~50-70% for these four cell types (Table 1). Additionally, hiPSCs and mouse BM cells still behaved...hepatocytes Myd88 ~50% Human HSCs Myd88 ~50% Table 1: Nanoblades editing efficiencies of primary cells....resources on the Addgene blog Learn about RNP delivery Learn about CRISPR delivery methods for mammalian...Nanoblades pseudotyped with a mix of VSV-G and the baboon endogenous retrovirus Rless glycoprotein (BaEVRless...have lower off-target edits. Another great thing about Nanoblades? They’re easily produced in a BSL2 lab...