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Showing: 221 - 240 of 657 results
  1. Troubleshooting Your Plasmid Cloning Experiment

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    Blog Post
    ... working with is correct. It's also best to use 1-2 ug of the vector for digestion. PCR Design primers...plasmid; a starting point could be a molar ratio of 1:2 (plasmid:insert), but this parameter has to be optimized...colonies (5-10) and grow them in a small culture volume (2 or 3 ml) containing the corresponding antibiotic, ...constructs. His work was acknowledged in hundreds of publications including Cell, Nature, and other journals. ...
  2. Plasmids 101: Expressing shRNAs for RNA Interference

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    Blog Post
    ...downstream genomic sequences (Figure 2B).   Figure 2: A comparison of an shRNA plasmid sequence and an ...module_attribute "schema_version" is_json="true" %}{% raw %}2{% endraw %}{% end_module_attribute %}{% module_attribute...References Bartel, D. P. (2004). MicroRNAs. Cell, 116(2), 281–297. https://doi.org/10.1016/s0092-8674(04)00045...miRNA-guided gene silencing. Nucleic Acids Research, 50(2), 617–634. https://doi.org/10.1093/nar/gkab1256 Lee...variety of small RNA types to choose from and can be catered for your specific experiment. For this blog, we...is an umbrella term for a number of different applications that involve different types of small RNA molecules... by a ribonuclease called Dicer. In a great simplification of the process, Dicer chops off the loop of...
  3. Pairing CombiGEM and CRISPR for Combinatorial Genetic Screening

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    Blog Post
    ...CombiGEM lentiviral vector backbone pAWp12 (Figure 2). Cloning from the pAWp28 storage vector to the pAWp12... before beginning your experiments. Figure 2: Strategy for assembling barcoded combinatorial gRNA...PMID: 25114216. PubMed Central PMCID: PMC4151723. 2. Doench, John G., et al. "Optimized sgRNA design to...sequences via oligo synthesis using the format indicated below and pool-clone them into the pAWp28 storage...realization of a variety of perturbations and applications in functional genomics, cell reprogramming, ...CRISPR/Optogentics Tools Resources on Addgene.org Catch up on Your CRISPR Background with Our CRISPR Guide...
  4. Evolution of Brainbow: Using Cre-lox for Multicolor Labeling of Neurons

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    Blog Post
    ...labeling of delicate axonal and dendritic processes not previously visible with Brainbow-1 and -2. The general...Brainbow mouse neural labeling system. Brainbow-1 and -2 have been further refined to create Brainbow 3.2. ...M-CFP expression; these deletions are defined using 2 loxP variants (only identical loxP sites can mediate... each fluorophore. Third, Brainbow-1 and Brainbow-2 each contained a “default” state; for example, Brainbow...Between Brainbow Systems   Brainbow variants and applications beyond the mouse brain In addition to improving...temporal control without the need for germline modification, and enables Brainbow to be used in a variety...technique will provide important insights into the complicated physical organization of the brain and other ...
  5. Quickest Way to Deposit Plasmids: The Deposit Spreadsheet

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    Blog Post
    ... Step 1. Steps 2 and 3 are usually very easy — our tech transfer team will communicate with your organization...columns are shown in red in the spreadsheet (Figure 2) and are described in Table 1. Some cells have drop-down...Filling out and sending the deposit spreadsheet Figure 2: Example of the deposit spreadsheet showing the first...species can be indicated in the “Species Other” column. Relevant Mutations Indicate the amino acid...name and match the name as it appears in its publication or as it is commonly known in your lab. Plasmid...descriptive purpose focuses on the practical application of the plasmid and will help a scientist outside...reagent/antibody, unspecified, or other. If other, indicate type in “Vector Type Other” column. For example...
  6. Synthetic promoter AAVs for cell-type specific expression in retinal cells

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    Blog Post
    ...retinal cell-type specific genes from mice. Strategy #2 (ProB): Create promoters using phylogenetically conserved...would express Cre-mCherry and GFP.   Figure 2: Synthetic promoters can be paired for targeted expression...1345-1356. https://doi.org/10.1038/s41593-019-0431-2  Neff, E.P. An AAV library for retinal cell expression...channelrhodopsin, fused to a fluorescent GFP marker (CatCH-GFP). The lab deposited AAV plasmids containing ...expression. Surprisingly, <1% of synthetic promoters replicated the expression specificity of the wild-type promoters...reproducibly labeled retinal cells can be found here.  Applications for synthetic promoter AAVs Besides restricting...synthetic promoters have a few other potential applications: Using promoter combinations for targeted expression...
  7. Pathways Over Time Plasmids Engage Students in Functional Genomics Research

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    Blog Post
    ...experiences to undergraduate students (1, 2), but educators face significant challenges in designing suitable...Change in Undergraduate Biology Education: A Call to Action, Washington, DC. 2. President's Council of Advisors... by western blotting in other experiments (Figure 2).   Complementation reveals conservation of function... become very different due to a whole genome duplication and extensive rearrangements in the S. cerevisiae...overexpression vector. This plasmid contains origins of replication and selectable markers that allow students to...met deficiencies (manuscript in preparation), indicating that Met protein functions have been largely ... research into undergraduate courses and in communicating science to the public. You can find out more...
  8. Fluorescent Proteins 101: Introduction to FRET

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    Blog Post
    ...Central PMCID: PMC18018. 2. Miyawaki, Atsushi, et al. "Fluorescent indicators for Ca2+ based on green ... fluorophore excitation by absorption of a photon 2. Energy transfer from the excited donor directly to...PMID: 24194740. PubMed Central PMCID: PMC3810607. 2. Bajar, Bryce T., et al. "A Guide to Fluorescent Protein...sufficient spectral overlap, the fluorophores must be located within 1-10nm of each other and be oriented appropriately...decision easier. 1. Müller, Sara M., et al. "Quantification of Förster resonance energy transfer by monitoring...have enhanced the ability of labs to answer sophisticated questions about cellular processes. Currently...
  9. Antibodies 101: Stripping and Reprobing Western Blots

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    Blog Post
    ...incubation at 37 °C. Wash the membrane for 5–10 minutes 2–3x in fresh wash buffer such as PBS or TBST. Stringent...Purpose Tris HCl 62.5 mM Buffer SDS 2% (w/v) Detergent Β-mercaptoethanol (βME) 100...minutes at 50 °C. Wash the membrane for 5–10 minutes 2–6x in fresh wash buffer such as PBS or TBST. Note ... tool to identify a protein of interest in a complicated solution like cell lysate. But they can be a ...
  10. Adeno Associated Virus (AAV) for Cell and Gene Therapy

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    Blog Post
    ...AAVs in the clinic Thus far, AAV vectors AAV1, AAV-2, AAV1-AAV2 hybrids, AAV-6, AAV-7, AAV-8, AAV-9 and...neutralizing antibodies against some AAV types, AAV1, 2, 3 and 5 are thought to be as high as 70% among the... 10.24 (2003): 1999-2004. PubMed PMID: 14566358.  2. Hirsch, M. L., et al. "Self-complementary AAV mediates...passionate about HIV cure research and science communication.     References 1. Gaspar, H. B., S. Howe, and...affinity-purified receptor-targeted viral vectors." Nature communications 6 (2015): ncomms7246. PubMed PMID: 25665714...our AAV Production Protocol Check out our AAV Purification Protocol ...
  11. Making CRISPR Plasmids Using Fragmid

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    Blog Post
    ... of components, such as your CRISPR enzyme or Pol 2 promoter. The options available in each class, or ...overhang specific to the type of module it is (Pol 2 protomer, Cas protein, ect...). Whatever individual... (KO, CRISPRa, CRISPRi, editing)   Figure 2: Selecting module fragments on the Fragmid website...ampicillin resistance cassette and an origin of replication, which are not schematized. Sizes of fragments...five months. When they tested those clones (in duplicate), 93% had the correct banding pattern in the restriction...correct. Because they created the assemblies in duplicate, they were able to confirm that at least one plasmid...
  12. Empty Backbones - Choosing Your Perfect Plasmid Backbone

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    Collection
    ...backbone with MS2 loops at tetraloop and stemloop 2 and EF1a-zeo resistance marker pLenti CMV/TO GFP-Zeo...plasmids containing only the elements needed for replication in the host cell and are designed for a user ...Protein Function: Viral Vector Delivery, Genome Modification, mRNA Regulation, and More Selectable Markers...collection page Zebrafish CMV, h2afv, XlEef1a1 See our dedicated Zebrafish Plasmids and Resources collection page...Additionally, tags are commonly added to aid in protein purification. Just remember to remove the stop codon for ...myristoylation signal GST Protein purification pEBG - N-terminal GST for mammalian...expression GST plasmids made by Addgene MBP Protein purification pET28-MBP-TEV - Bacterial expression with MBP-TEV...
  13. Cpf1 Update: Comparison to Cas9 and NgAgo

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    ...PMID: 27272384 Find plasmids from this publication at Addgene. 2. Kleinstiver, Benjamin P., et al. "Genome-wide...Cpf1 is a single RNA-guided endonuclease of a class 2 CRISPR-Cas system." Cell (2015). PubMed PMID: 26422227...Cpf1 Is a Single RNA-Guided Endonuclease of a Class 2 CRISPR-Cas System. Cell. 2015 Sep 23. pii: S0092-8674...mismatches on modification by AsCpf1 (red) or LbCpf1 (blue). Mismatch positions are indicated below each ...eclipse any of the CRISPR nucleases in AAV-based applications. Get More Cpf1 Background Here THE ORIGINAL ... off-target editing rates, determined using sophisticated genome-wide analysis. At many of its computationally...compared the ratio of total off-target to on-target modification for AsCpf1 and LbCpf1, and found that both orthologs...
  14. Three Key Considerations for Precise Neuronal Targeting Using AAV Technologies

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    Blog Post
    ... characteristics of select AAV serotypes in Table 2 from the paper. Delivery of AAV into the brain can...routes for neuroscience see Table 1 from the paper. 2. Manipulate your cell of interest: Cell-type specific...experiments! Late last year, we hosted our first AAV Education and Development workshop aimed at brainstorming...even further. For example, injecting AAVs at one location can result in expression of an optogenetic payload...shown in Figure 1, injected retrograde AAVs at one location result in opsin expression in their cell bodies...
  15. CRISPR 101: Anti-CRISPR Proteins Switch Off CRISPR-Cas Systems

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    Blog Post
    ...virus 2 (Mayo-Muñoz et al., 2018). Only viral particles that have the gene deletion could replicate when...base pair to another base pair at a specific site. 2. Temporal, spatial, or conditional control of CRISPR...Editing of Sulfolobus islandicus Rod-Shaped Virus 2. Viruses 10:695 . https://doi.org/10.3390/v10120695..., 2018). For example, AcrIIA4 mentioned above indicates that it’s the fourth Acr protein discovered that...B, Bondy-Denomy J (2020) Anti-CRISPR protein applications: natural brakes for CRISPR-Cas technologies....light-inducible Cas9 activity? Check out these these plasmids Catch Up on Your CRISPR Background with Our Guide Pages...
  16. "What Makes a Good Mentor?" and 6 More FAQs About Science Mentoring

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    Blog Post
    ...portion of our careers. In that time we may have only 2-3 formal supervisors that will provide guidance and...be challenging – is advice and guidance from only 2 people enough?  For many years I’ve been organizing... helps you reach your goals Listens well and communicates clearly and openly Gives honest feedback without...lab. If only every science trainee had such a dedicated person guiding the start of their career. “I want...
  17. AAV Vector Quality Control: Going the Extra Mile with NGS

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    Blog Post
    ...the mixed sample in our pipeline (see Figure 2, sample 2). When we blindly analyzed AAV-68544, we were...look for potential contaminants. The analysis is a 2-step process using Geneious software: First, the individual...These impurities cannot be removed during the purification step because they are inside the virus itself...very low concentration. So how do we make sure to catch all of these potential mishaps before distributing...Guerin et al., 2020).  In addition to genome identification, we developed custom open-access Python scripts...
  18. Cloning Mammalian Cells with the Agarose Method

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    Blog Post
    ...3 plates at different densities for selection). A 2% agarose solution is then melted (and thereby sterilized...96-well assay plate. We generally freeze at least 2 ampules each of 4 clones with different levels of ...of agarose, which is then overlaid with the firmer 2% agarose gel solution discussed above for picking....to rapidly punch out cell clones with sterile truncated pipet tips. Indeed, an experienced operator can...wiped down with 70% ethanol, and a box of sterile truncated pipet tips (USA Scientific #1011-8410) is also..., and making sure we always maintain a backup replicates of each clone in case of contamination. We do...
  19. Mapping the 4D nucleome with CRISPR/Cas9

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    Blog Post
    ...resolved loci with physical map distances of 75 and 2 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... its nuclease activity, catalytically dead Cas9 (dCas9) has many applications, the most well-known being...characterizing the 4D nucleome. Future modifications and applications Ma et al. developed this technique ...have major applications to cancer, for example, the visualization of chromosomal translocations or chromosomal...plasmids from this publication at Addgene. A protein-tagging system for signal amplification in gene expression...technique published every week! One of the newest applications is a colorful system that uses fluorescently...
Showing: 221 - 240 of 657 results