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Showing: 81 - 100 of 887 results
  1. New Tool for Lineage Tracing: The ClonTracer Library

    Type
    Blog Post
    Published
    Sept. 22, 2015, 2:30 p.m.
    ... a post-doc in the Target ID and Validation Group and says that she decided to do a post-doc at Novartis...library, propagated it, separated it into roughly identical replicate groups, and treated these groups with...cell line containing an activating mutation in epidermal growth factor receptor (EGFR) with the ClonTracer...models. She hopes that the library can be used to identify appropriate, non-overlapping targets for drug ...distinct evolutionary paths to become resistant to epidermal growth factor receptor inhibition." Nature medicine...
  2. Enhancing CRISPR Targeting Specificity with eSpCas9, SpCas9-HF1, & HypaCas9

    Type
    Blog Post
    Published
    Dec. 16, 2015, 3:30 p.m.
    ...Looking at the structure of the Cas9 nuclease (PDB ID: 4OO8 and 4UN3), Slaymaker et al. hypothesized that...Benjamin P., et al. "High-fidelity CRISPR–Cas9 nucleases with no detectable genome-wide off-target effects."...As evidenced by all the CRISPR publications, press, and plasmids out there, it’s obvious that CRISPR ...1.1), followed by a technique for detecting genome-wide double strand breaks (BLESS), revealed that these...as predicted, decrease off-target effects genome-wide. Further work by Slaymaker et al. showed that these... al. "Crystal structure of Cas9 in complex with guide RNA and target DNA." Cell 156.5 (2014): 935-949....Website Find CRISPR Plasmids Browse our CRISPR Guide Pages Find Genome Engineering Resources ...
  3. Lab Automation at Addgene

    Type
    Blog Post
    Published
    March 22, 2018, 1:28 p.m.
    ...removable parts to fit on the deck of the Biomek. The FXP id also able to do high throughput DNA preps and other...purification, and filling vials with agar. I’ll also provide you with some tips on how to automate some simple...protocol and, after looking at a few options, we decided on Beckman Coulter’s Biomek FXP. We had a previous...scale. Using the BIOROBOT Universal Platform is ideal because it eliminates the potential of human error...standard molecular biology techniques Browse our video library Check out our molecular biology reference...
  4. Common Injection Routes in Mice

    Type
    Blog Post
    Published
    Jan. 22, 2025, 9:42 p.m.
    ...Skill required: beginner Intradermal Intradermal (ID) injections occur between the layers of the skin.... post has provided a good introduction to common injection routes in mice! When considering what method...administering vaccines, pain meds, or other drugs. Identifying the proper injection site is straightforward,...knowledge. Intrathecal injections are used for a wide array of purposes, but mainly for the delivery of...sounds very disruptive, but surprisingly, it is considered minimally invasive. Restraint: anesthesia Location...common. Due to the intubation, this procedure is considered quite invasive. Restraint: anesthesia Location...feeding tube with a bulb on the end, which prevents accidental tears or punctures to the throat. The feeding...
  5. Supporting Reproducibility with a Connected ELN

    Type
    Blog Post
    Published
    Jan. 17, 2019, 1:38 p.m.
    ... It’s possible to associate the depositor’s ORCID ID with the deposit, and a DOI is added to the deposit...integration is described in this video and the Figshare integration in this video.  The ability to link from...making it searchable and shareable, but some ELNs provide better support for reproducibility than others....reproducibility is limited in two ways – only data inside the ELN is reproducible, and only the highly restricted...requirements that emerged from intensive engagement with a wide range of people at the University of Wisconsin in...principles in mind, and in response to further input provided by the research communities at the University ...online file storage tools, as illustrated in this video, and to data stored on institutional and lab servers...
  6. Tips for arabidopsis transformation

    Type
    Blog Post
    Published
    Oct. 25, 2018, 1:23 p.m.
    ...https://books.google.at/books/about/Arabidopsis.html?id=IfZAMNPWVk4C&redir_esc=y (Accessed: 21 September ...culture into a container that is wide enough to dunk your plant’s flowers inside. 50 mL falcon tubes or plastic...process right the first time. I’ll lay out some guidelines here. A detailed transformation protocol, as ... et al. (2006) ‘A rapid and robust method of identifying transformed Arabidopsis thaliana seedlings following...
  7. The Challenges of Cell Culture

    Type
    Blog Post
    Published
    May 5, 2016, 2:30 p.m.
    ...Short Tandem Repeat (STR) profiling can be used to ID the cell line. The same test is so good that it is...many journals strictly require evidence of cell line provenance and identity. The Nature Publishing Group...Resources ATCC Animal Cell Culture Guide Thermofisher Guidelines for Maintaining Cultured Cells Invitrogen...Invitrogen Cell Culture Basics Guide Abcam Cell Culture Guidelines Resources on the Addgene Blog Learn ...culture in the present day Cell culture is a widespread tool used in the fields of oncology, virology...this reason. Unreproducible results are rife. Misidentified or cross-contaminated cells have been known ...Invasion in Renal Cancer Cells, Marker-independent identification of glioma-initiating cells. The International...
  8. Easi-CRISPR: Generating Knock-In and Conditional Mouse Models

    Type
    Blog Post
    Published
    April 5, 2018, 12:42 p.m.
    ...desired insert (e.g., mScarlet).   Plasmid ID Plasmid Name Tags 69090 pMJ915 MBP (N...differences in guide RNA efficiency. For example, in a two-guide floxed experiment, if one guide cleaves less...from the target exon on either side. They have successfully used guides targeting the same or complementary...on each side. For optimal repair, place the loxP sites precisely at the cut site for each guide. This design...RNP) complexes of Cas9 protein and the separated guide RNA components (crRNA and tracrRNA) for maximum ...given location, you’ll need to design only a single guide and your donor ssDNA. Here, we’ll use the example...homology-directed repair experiments, you’ll want the guide cut site to be as close as possible to your desired...
  9. FLEx Technology and Optogenetics: Flipping the switch on gene expression with high spatial and temporal resolution

    Type
    Blog Post
    Published
    Oct. 17, 2019, 12:28 p.m.
    ...Biology. New York: W. H. Freeman, 2000. Bookshelf ID: NBK21668. Matsuno-Yagi, Akemi, and Yasuo Mukohata...neuronal subpopulations, and this represents a major downside in optogenetics (Belzung et al., 2014). This could...genes. Strong cell-specific promoters, on the other side, are too long for rAAVs, which can only package ...Double-floxed Orientation)) is a powerful tool that provides precise temporal and spatial control of gene expression...produce behavioral and electroencephalography evidences of arousal in mice previously subjected to steady-state...., 2019). FLEx vectors represent, therefore, an ideal partner to optogenetics to understand the cellular...
  10. Antibody Validation for Flow Cytometry

    Type
    Blog Post
    Published
    Sept. 10, 2024, 1:15 p.m.
    .... (2024). A guide to selecting high-performing antibodies for Synaptotagmin-1 (Uniprot ID P21579) for ...antibodies when possible. If cost is prohibitive, consider an approach that prioritizes more reproducible... rate. If you need a more permanent knockdown, consider using shRNA vectors instead. With both siRNA and...this approach should also allow for the clear identification of the cell types of interest. By correlating...correlating your data sets, you can increase confidence that the labeling observed represents the expression ... at similar levels in your cell lines, you can consider a cell treatment approach. If there is a cell ...protein. A challenge to this approach is that the identity of the epitope is often not available to confirm...
  11. 27 Hot Plasmids from 2016

    Type
    Blog Post
    Published
    Dec. 22, 2016, 3:03 p.m.
    ...immunohistochemistry, and are summarized in the table below:   ID Cv (Capsid) FLAG Tag Terminus 79629 (N) and 79628... Neurosci 2016. PubMed PMID: 26950006 Plasmid ID Plasmid Name Plasmid Type 74309 pcDNA3.0-TRPV4-...DHS-seq, FAIRE-seq, and CHIP-seq), genome-wide identification and quantification of enhancer activity have...RNA-guided targeting mechanism. However, the laborious construction of repair templates and guide RNA ...: Targets of RNA-binding proteins identified by editing Identifying targets of RNA-binding proteins (RBPs...region sequencing) that tests enhancer sequences outside of their endogenous chromatin environment and relies...screen the entire genome for genes that regulate a wide variety of phenotypes, including but not limited...
  12. 15 Hot Plasmids from 2017

    Type
    Blog Post
    Published
    Jan. 9, 2018, 3:02 p.m.
    ...editing for precise genome modification. Plasmid ID Plasmid Name Cas9 Variant Speacial Features 85169...Cas9, been identified. In Rauch, et al. 2016 the Joseph Bondy-Denomy lab at UCSF identifes four proteins...our hot plasmids articles. These brief articles provide a synopsis of a plasmid or group of plasmids' functions...may be preferred for their intended uses, they provide a well-defined framework for the production of ...available at Addgene, and the Doyon lab has also provided a detailed protocol at Protocol Exchange. Plasmid...editors with editing windows as small as 1-2 nucleotides! To reduce off-target effects associated with... created HF-BE3, a base editor containing high fidelity Cas9 variant HF-Cas9. They subsequently tested...
  13. CrispyCrunch: High-throughput Design and Analysis of CRISPR+HDR Experiments

    Type
    Blog Post
    Published
    Feb. 7, 2019, 2:16 p.m.
    ...(See section below.) For guide design, we decided to adapt the popular guide design tool Crispor by Max...which the guide binds. However, if the PAM resides in a coding region, the mutation may cause side-effects...optimal mutation in CrispyCrunch: If the guide PAM resides outside a coding region in a UTR, CrispyCrunch... experiments designed outside CrispyCrunch, or you can input pre-existing guides for primer design. The...return guides and primers in batch, optimized for HDR. Compared to wealth of resources for guide design... summary per batch. Ranking guides for HDR in-depth In other tools, guides are ranked by specificity of...specificity of a guide to the target. The CFD score ranges between 0 and 100 for each guide, with 100 being...
  14. Sequencing Options for CRISPR Genotyping

    Type
    Blog Post
    Published
    Oct. 4, 2016, 2:30 p.m.
    ...genome-wide, unbiased identification of double-strand breaks (DSBs) evaluated by sequencing (GUIDE-seq) ... Not Provided 5% Inexpensive, simple Low-throughput, low sensitivity Sanger Sequencing Provided 20% ...PMC3782611. 8. Tsai, Shengdar Q., et al. "GUIDE-seq enables genome-wide profiling of off-target cleavage by ...gel electrophoresis. Surveyor™ and T7E1 have been widely adopted due to their relative simplicity and low... problem with these assays is that they do not provide sequence-level data. They also have a limit of ...sequencing. Used in concert, these approaches can provide the researcher with a reasonable level of certainly...off-targets. This is a valuable step toward enhancing confidence and reproducibility of a study’s findings. Table...
  15. Twenty Years of Sharing: Expanding Accessibility

    Type
    Blog Post
    Published
    Nov. 21, 2024, 10:47 p.m.
    ...Views Guides CRISPR Guide Lentiviral Guide AAV Guide Optogenetics Guide γ-Retrovirus Guide Protocols... popular videos are protocol videos, where showing exactly how to execute a step can provide needed clarity...accessible, due to a wide range of logistical barriers. Addgene worked to identify, reduce, and remove ...allowing people to access a wide catalog of plasmids from all over the world. This idea, that available and accessible...Addgene distributes to per year, 2005-2023. We identified and offered a number of solutions that increased...over half of our orders coming from researchers outside the USA, having some materials available to order...consistently accessible, wasn’t an option. So we identified countries that would benefit from a third-party...
  16. Comparing Cas9 to NgAgo: Can the Argonautes Best CRISPR?

    Type
    Blog Post
    Published
    June 9, 2016, 2:30 p.m.
    ...DNA guides NgAgo uses 5’ phosphorylated DNA guides (so called “gDNAs”) rather than the RNA guides employed...remains faithful to its guide DNA and cannot switch guides. While this fidelity would prevent other small...24 base DNA guides may be more user-friendly, since they can be ordered as oligonucleotides and should ...gDNA guides will also need to be transfected into the cells of interest. In contrast, RNA guides must ... tested if NgAgo preferred certain guide sequences - using 5 guides/gene for 10 genes, they did not observe... the DNA guide impaired NgAgo activity, with three mismatches abolishing activity. One-guide faithful...important role in RNA interference, binding RNA guides to cleave foreign RNA. Argonaute proteins are also...
  17. CRISPR 101: Validating Your Genome Edit

    Type
    Blog Post
    Published
    Nov. 3, 2022, 12:15 p.m.
    ...similar to TIDE known as TIDER (Tracking of insertions, deletions, and recombination events). TIDER can screen...both trace files to the TIDE tool online along with your sgRNA sequence. The TIDE software will generate...off-target effects with Sanger sequencing, provided you have some idea of where in the genome you might expect...knockouts is Tracking of Indels by Decomposition (TIDE) (Brinkman et al., NAR). This technique uses the... deletion frequency. Fig. 1: Overview of TIDE. The input is sequencing trace files of WT and edited...input population or clone.   How to perform a TIDE First, use PCR to amplify the target region of interest...graph representing all insertions and deletions identified within a given genomic window, along with the...
  18. Antibodies 101: The Basics of Western Blotting

    Type
    Blog Post
    Published
    March 8, 2021, 2:41 p.m.
    ...with peptide/protein analyses using ELISA. Peptides 72:4–15 . https://doi.org/10.1016/j.peptides.2015.04.012...vary the acrylamide content of the gel. For small proteins, use a higher percentage of acrylamide to increase...usually composed of a nitrocellulose or polyvinylidene difluoride (PVDF) in a step called protein transfer...they provide qualitative measurements. If you require precise quantification of a protein, consider using...immunoprecipitation and pull-down assays.  Westerns are divided into two categories, native and denaturing. In ... protein mix by size Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) is the first...agent, typically containing thiols, to cleave disulfide bonds. Load the samples, one sample per lane, ...
  19. 10 Steps to a Perfect Science Talk

    Type
    Blog Post
    Published
    Aug. 23, 2016, 2:30 p.m.
    ...Having answer slides ready after your formal conclusion slide will also help with your confidence. It is best...suspense. Notice the simplicity of their slides and how the slides complement the spoken message. Learn from...speak to start creating slides or thinking about content. Create a Google.slides or Powerpoint file right...this might sound condescending, consider explaining the term on a slide but not reading the explanation...everything I allow 1 slide for every 1 minute of talk length, and then I cut a few more slides. Do not run over...always be a future boss in the room, so it is a good idea to start thinking about public speaking early and...talks for non-academic settings. Many of these guidelines will apply to any type of science presentation...
  20. High Complexity Golden Gate Assembly with NEB’s DAD

    Type
    Blog Post
    Published
    Aug. 1, 2023, 1:15 p.m.
    ...overhangs with the same three nucleotides in a row; (4) no more than two nucleotides in the same position; (...that high-fidelity reactions could be done using overhang sets that broke rules 3—5. Fidelity, it turns... design high-fidelity Golden Gate Assemblies and overhang sets: NEBridge Ligase Fidelity Viewer™; NEBridge...reactions. NEBridge Ligase Fidelity Viewer This tool allows a user to check fidelity of an overhang set by ...remarkably high 71% fidelity, while the 52-piece assembly of a lac operon dropped to 49% fidelity, with significant...be strictly followed in order to generate high-fidelity reactions. (Need a refresher? The five rules are... a single tube. Their assembly had a predicted fidelity of 71% (Pryor et al., 2020). And in 2022, using...
Showing: 81 - 100 of 887 results