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We narrowed to 560 results for: mal.2

Showing: 81 - 100 of 560 results
  1. Rosella: A Fluorescent pH-Biosensor for Studying Autophagy

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    ...in yeast. Autophagy,4(2), 205-213. doi:10.4161/auto.5331. PubMed PMID: 18094608 2. Sargsyan, A., Cai, J... 9 *Optimal sequential excitations wavelengths as determined by Rosado et al: see Table 2 for more...environment like the vacuole or lysosome. See Table 2 for a summary of what color fluorescence Rosella emits...on the fluorescent properties of Rosella.   Table 2: Effect of Localization on Rosella’s fluorescence ...fluorescence accumulates in the vacuole. See Figure 2 for an example of what fluorescence looks like for... gene encodes a vacuolar alkaline phosphatase. Normally PHO8 is synthesized at the ER, delivered to the...Atg8p (“p” stands for protein) associates with autophagosomal membranes, so tagging it with GFP allows for...
  2. Adenoviral Vector Production and Troubleshooting

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    ...repeated multiple times (2-4 rounds) at increasing scale over the course of 1-2 weeks. Each round of amplification...creating adenoviral vector constructs. It consists of 2 plasmids: a shuttle vector (in which the transgene...Addgene’s Adenoviral Guide webpage, and references 1, 2.*Pro-Tip*: once the correct recombinant pAdV plasmid...sequenced to confirm its integrity. Initial production (2-3 weeks) - Here you’ll produce the primary recombinant...media will turn yellow. Do NOT change the media (add 2-3 mL of fresh media once a week), and do NOT harvest...it will result in very low titer. Amplification (1-2 weeks) - The rAdV-S is used to infect more HEK293 ...in a 10-100-fold increase in virus. Purification (2 days) - Purification is required if rAdV is to be ...
  3. Viral Vectors 101: Virus Safety

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    ...cancer. These viruses need to be handled in a BSL-2 (or BSL-2+) lab and require additional safety measures.... BSL-1. In BSL-2 labs, eye protection is required any time you have to work with BSL-2 materials, such...respiratory diseases in humans, earning this virus a BSL-2 classification. Lentivirus (a type of retrovirus) ...recommended or required in BSL-1 and required in BSL-2 labs. When working with lentivirus, many organizations...sprayed into the air. For lentivirus and other BSL-2 materials, you’ll need to use aerosol-tight caps, ...percentage of the decontaminate to be used for BSL-2 waste, and of course, if you are working with a substance...from viruses that can infect people, cells, and animals. Some of these viruses are completely inert, but...
  4. The Materials Science of Optogenetics Experiments

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    ...different steps and materials required for each [1, 2]. This protocol [3] provides, in exquisite detail,...stimulation         In the video above, Channelrhodopsin 2 (Chr2) has been expressed in the motor cortex of a...lasers are relatively cheap and will run you about $2-3,000/laser. However, an important caveat is that ... the light-gated cation channel, Channelrhodopsin 2 (ChR2), exists in several states: closed/light receptive...PMID: 21628464; PubMed Central PMCID: PMC3138296. 2. Sparta DR, et al. Construction of implantable optical...board, Jacqueline N Crawley  [et al]. 2012;Chapter 2:Unit2 16. doi: 10.1002/0471142301.ns0216s58. PubMed...your opsin through a small piece of fiber optic cable implanted into the animal’s skull (right). The fiber...
  5. Viral Vectors 101: AAV Serotypes and Tissue Tropism

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    ...sulfate proteoglycan (HSPG)3 AAV receptor (AAVR)2 Epidermal growth factor receptor (EGFR)3 AAV8 Laminin...genomic structure of AAV2, so they are formally called rAAV2/1, rAAV2/2, and so on, although we often use ...α2,3-/α2,6 N-linked sialic acids1 AAV receptor (AAVR)2   AAV2 Heparan sulfate proteoglycan (HSPG)3 ...3 AAV receptor (AAVR; not strictly required)2 Human fibroblast growth factor receptor 1 (FGFR1)3 αVβ5...AAV5 2,3-N-linked sialic acid4 AAV receptor (AAVR)2 Platelet-derived growth factor receptor (PDGFR... Laminin receptor (LR)3 AAV receptor (AAVR)2 Carboxypeptidase D (CPD), also called AAVR25   AAV9 ... Terminal N-linked galactose3 AAV receptor (AAVR)2 Laminin receptor (LR)3 Putative integrin3 ...
  6. Viral Vectors 101: Producing Your rAAV

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    ...digital PCR. Human Gene Therapy Methods, 25(2), Article 2. https://doi.org/10.1089/hgtb.2013.131 Lock,... virus Once you have transfected your cells, wait 2–5 days and then collect the supernatant and/or producer...quantification of adeno-associated virus serotype 2-derived inverted terminal repeat sequences. Human ..., R., & Kleinschmidt, J. (1999). Titration of AAV-2 particles via a novel capsid ELISA: Packaging of genomes... genomes can limit production of recombinant AAV-2. Gene Therapy, 6(7), Article 7. https://doi.org/10.1038...Characterization of a recombinant adeno-associated virus type 2 Reference Standard Material. Human Gene Therapy, 21...dose (TCID50) (Zen et al., 2004).  To choose the optimal titering assay, you’ll need to understand how different...
  7. Starter guide to induced pluripotent stem cells (iPSCs) part 1:  A renaissance in regenerative medicine

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    ...them in Regenerative Medicine. Acta Naturae, 2010. 2(2): p. 18-28. PubMed PMID: 22649638. PubMed Central... In mammalian development, cells found in the zygote through to the morula stage are totipotent [2-4]....capability to differentiate into specialized cell types [2]. We general speak of 4 levels of stem cell potency...stem cells (ESCs), which I discuss in detail below [2]. Multipotency: When a cell can differentiate into...PMID: 26726264. PubMed Central PMCID: PMC4686367. 2. Jaenisch, R. and R. Young, Stem cells, the molecular... blastocyst [6]. They are isolated mostly from abnormal and/or supernumerary preimplantation embryos that...cells, these multipotent stem cells are located in small quantities in specific “stem cell niches” found ...
  8. Deep Mutational Scanning with One Pot Saturation Mutagenesis

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    ... that results in a polymerase error rate of up to 2% per nucleotide position. The “sloppy” PCR reaction...modifications: 1) increased concentration of Taq polymerase, 2) increased PCR extension time, 3) increased concentration...to synthesize a complementary mutant strand (step 2 and 3). Then the uracil-labeled template strand is...restrict site matter? Most of the time no, but there are 2 instances where it does. 1) When the backbone vector...ExoIII. See the below figure for an example like this. 2) When your gene of interest has a BbvCI site(s). If...saturation mutagenesis method are 1) ease of use, 2) time savings, and 3) ability to perform single site...PMID: 23766324. PubMed Central PMCID: PMC4409680. 2. Mccullum, E. O., Williams, B. A., Zhang, J., & Chaput...
  9. Important Considerations When Using AAVs

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    ...University of Manitoba due to their Biosafety Level-2 or 2+. Please Note: Despite the fact that AAVs themselves...long and stable expression (up to 9 months in mice [2]). Low Immune Response: Compared to other viral vectors... location. Location (1): What tissue? Location (2): Where in the tissue/which cell type? Location (3...may be sufficient to overcome the transport issues. 2. Failure to plan (for storage) Is planning to fail...Find Ready-to-Use Retrograde AAV Preps at Addgene 2) Comparison of genetically engineered receptors (i.e...Therapy 15.10 (2007): 1740-1743. PubMed PMID: 17882145. 2. Zincarelli, Carmela, et al. "Analysis of AAV serotypes... tropism and axonal transport of AAV serotypes 1, 2, 5, 6, 8 and 9 in the mouse brain." PloS one 8.9 (...
  10. CRISPR 101: Multiplex Expression of gRNAs

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    ...illustrated in the schematic below.   Figure 2: gRNA target sequences (colored rectangles) are cloned... plasmids: This plasmid set allows you to express 2-4 gRNAs, with four being the ideal number. First you...the total number of gRNAs you wish to clone, from 2-7. For example, if you’re expressing 4 gRNAs, you’...gRNAs into spectinomycin-resistant plasmids pX330S-2 to pX330S-(last gRNA number). The 5’ most gRNA is ...Multiplexing Plasmids: These plasmids allow you to assemble 2-4 gRNAs through Golden Gate or Gibson Assembly. gRNAs...Multiplex Plasmids: These plasmids allow expression of 2-5 gRNAs in zebrafish. Custom destination vectors are...and a subsequent curing protocol that requires only 2-3 hours incubation. Kondo Lab multiplexed base editing...
  11. Cpf1: A New Tool for CRISPR Genome Editing

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    ...Cpf1 is a single RNA-guided endonuclease of a class 2 CRISPR-Cas system. Figure from Zetsche et al., 2015...2015. How was Cpf1 found and tested? Class 2 CRISPR systems, including the type II Cas9-based system...employed by class 1 systems. A putative new class 2 nuclease, Cpf1 (CRISPR from Prevotella and Francisella... the 3’ end of the target sequence. Figure 2: Effects of (A) double and (B) single base pair gRNA-target...Cpf1 is a single RNA-guided endonuclease of a class 2 CRISPR-Cas system." Cell (2015). PubMed PMID: 26422227... Find plasmids from this publication at Addgene. 2. Zetsche, Bernd, et al. "Multiplex Gene Editing by...Cpf1 orthologs that display cleavage activity in mammalian cells. Like Cas9 nucleases, Cpf1 family members...
  12. Multiplexed Capture of Promoter-enhancer 3D Chromatin Structures Using CRISPR

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    ...Originally published Dec 7, 2017 and updated Jul 2, 2020. Promoters may be the star of gene regulation...sequence targeted in the experiment. Figure 2: Comparing CAPTURE and CAPTURE 2.0.     Original...cell line expressing 1) FLAG-biotin-tagged dCas9, 2) BirA, and 3) one or more gRNAs Two separate lentiviruses...delivering 1) a BioTAP-tagged dCas9 and an eGFP tag, and 2) gRNAs Number of loci targeted One Many Sample...identified and the level of on-target enrichment. 2. Determining the spatial and hierarchical organization...Cytogenetics, 11. https://doi.org/10.1186/s13039-018-0368-2  Liu X, Zhang Y, Chen Y, Li M, Zhou F, Li K, Cao H...interactions, a restriction enzyme digest cuts DNA into smaller pieces, and proximity ligation creates chimeric...
  13. Viral Vectors 101: The Retroviral Lifecycle

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    ...that have been developed into retroviral vectors and 2.) a subclass of retroviruses called the lentiviruses...effectively. Retroviral structure   Figure 2: Structure of a retrovirus. Image re-used from Dong...Dong & Kantor, 2021 under CC-BY license. Figure 2 gives a detailed view of the structure of a retroviral...transfer of RT, which would actually occur in step 2 during uncoating. After uncoating, reverse transcription...one of the two strands’ DNA counterparts from step 2 will be integrated by the viral integrase protein ... Air. Environmental Science & Technology Letters, 2(4), 84. https://doi.org/10.1021/ACS.ESTLETT.5B00050...contact with every day (Prussin et al., 2015), only a small fraction typically cause disease. The gamma-retroviruses...
  14. CRISPRainbow and Genome Visualization

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    ...at a range of distances from 2-75 Mbp. Labeling multiple, intrachromosomal loci Building on the work of...publication at Addgene. 2. Ma, Hanhui, et al. “Multicolor CRISPR labeling of chromosomal loci in human cells...resolved loci with physical map distances of 2 and 75 Mbp, with the calculated fluorescent distances correlating...established physical map. In comparing pairs of targets ~2 Mbp apart, they noticed that they could evaluate the...dCas9 supplied by a separate vector. Figure 2: CRISPRainbow generates 6 unique colors and a white...gRNA was present or b. when a gRNA binding a non-mammalian sequence (GAL4) was supplied. In addition to ...turned their attention to mapping pairs of intrachromosomal loci. The technique successfully resolved ...
  15. Five Popular Model Organisms, Part 2

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    ... H. J. (2009). Rats! Disease Models & Mechanisms, 2(5–6), 206–210. https://doi.org/10.1242/dmm.002733 ...prokaryotic organism. With its fast growth rate, small size, and low cost, it’s understandable why E. coli...A close relative to the mouse, both are great mammalian models due to their size, physiology, and genetic...For these reasons rats were once the most used mammalian model in medical research with an archive of information...offspring (produces many seeds), self fertilizing, a small yet highly characterized genome, and is easily maintained... of the Brown Norway rat yields insights into mammalian evolution. Nature 428, 493–521 (2004). https:/...
  16. Screening for Successful Genome Editing with Digital PCR

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    ...resulting from non-homologous end joining (NHEJ) (2-5), depending on your desired genome edit. Since exploitation...each sample can be quickly calculated (details in [2]) and can be used to quantify rates of mutation in... have been reported for mismatch nuclease assays (2, 6, 7). Ability to distinguish between mono-allelic...assays, in addition to testing their performance (2). Remember that although digital PCR is a great screening...PMID: 24509632. PubMed Central PMCID: PMC4063274. 2. Findlay, S. D., Vincent, K. M., Berman, J. R. & Postovit...cost-prohibitive for many labs, and are often impractical for small projects. Most researchers instead turn to so-called...frustrating to work with, time consuming, and minimally informative. In this blog post, we’ll introduce...
  17. Fluorescent Proteins 101: Photoactivatable Fluorescent Proteins

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    ...fluorescent state make them useful for 2-color imaging with green PA-FPs. Table 2: Properties of Selected Reversible... conventional FP imaging. PA-FPs are divided into 2 main categories - those with irreversible and reversible... forms of the chromophore which contribute to the 2 peaks of wtGFP’s excitation spectrum- a major 397 ... / N99K / S148L / I165V / Q167P / L169V / I203R) (2) and PA-mRFP1(S146H / I161V / I197H) (3) were derived...with two distinct wavelengths of light (see Table 2). The best known reversible PA-FP is the naturally... above background. The majority of PA-FPs come in 2 flavours- monomeric and tetrameric. Tetrameric PA-...most PA-FPs, but, in 2015, the Looger Lab designed 2 variants of EosFP that can withstand these conditions...
  18. Harnessing TnpB for Genome Editing: A Compact and Versatile Tool for Your Research

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    ...Oligo 2 to screen. A 667-bp product confirms successful insertion. Step 6: Confirmation Pick 2–3 positive...unavailable, you can use TEEP — a tool based on animal data. Step 2: Prepare Oligos Oligo 1: Add 'tcaa' to...your forward guide sequence (see Figure 1). Oligo 2: Add 'ggcc' to the 5′ end of your reverse complement...Primer 92F (5′-cattacgcaattggacgacaac-3′) and Oligo 2 (specific to your target) to screen colonies via PCR...), 84–89. https://doi.org/10.1038/s41587-019-0337-2  Molla, K. A., Sretenovic, S., Bansal, K. C., & Qi... large DNA cargos. As a result, the search for smaller, compact genome editors has become a key focus ...Cas12a is a soccer ball, TnpB is a baseball — much smaller, but still powerful. Our lab recently harnessed...
  19. 3 Tips to Improve HDR Efficiency for CRISPR Editing in Human Cells

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    ...PMID: 23287718. PubMed Central PMCID: PMC3795411. 2Mali, Prashant, et al. "RNA-guided human genome engineering...improving editing accuracy by preventing re-editing and (2) optimizing “cut-to-mutation distance”. Furthermore...also takes into account that HDR is rare, usually 2-5% of the edited cells in our hands, these combined...screen a few hundred clones to find the right one Step 2 – Edit the cells a second time using a repair template...Additional CRISPR Resources on Addgene's CRISPR Guide Page 2. Optimizing "cut-to-mutation distance"  Even though... wisely (and let them cut close).   Figure 2: Relationship between cut site to mutation distance...to be incorporated into the edited genome. In mammalian cells such as stem cells, HDR is relatively rare...
  20. CRISPR Between the Genes: How to Experiment with Enhancers and Epigenomics

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    ...for the 2+ million DHS sites. See below for further details. DNA is a 3D Fractal Figure 2: DNA compaction...: 1. Find Enhancers that have NANOG binding sites 2. Design a CRISPR screen to target and disrupt the ...NANOG enhancers 3. CRISPR out the enhancers from step 2. See which ESCs die or differentiate Step 3 reveals...expression for NANOG enhancers, we’re ready for step 2: design a CRISPR screen to disrupt these enhancers...to CRISPR out the enhancers we identified in step 2. The result is a heterogenous population of stem cells...targeted disease therapies with minimal side-effects on healthy cells and maximal effect on unhealthy cells....
Showing: 81 - 100 of 560 results