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We narrowed to 609 results for: cas

Showing: 121 - 140 of 609 results

  3. Antibodies 101: Polyclonal Antibodies

    Type
    Blog Post
    Published
    July 14, 2021, 1:15 p.m.
    ...     References and Resources References Ascoli CA, Aggeler B (2018) Overlooked benefits of using polyclonal...their ability to bind the target antigen. In this case, the serum is run over a column containing the target...

  4. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

    Type
    Blog Post
    Published
    June 2, 2015, 6:06 p.m.
    ... gene networks with an integrated RNA and CRISPR/Cas toolkit in human cells. Nissim L, Perli SD, Fridkin...In the short time since its development, CRISPR/Cas9 genome editing has been used to study the effect...recombination. To further increase the utility of CRISPR/Cas9, it will be necessary to improve its multiplexing...RNAs (gRNAs) are commonly packaged in 400-500 bp cassettes containing the RNA pol III promoter, gRNA and ...and pol III terminator. These relatively large cassettes (considering the gRNA itself is ~100 bases) limit...construct size, it requires coexpression of Csy4 with Cas9 and the polycistronic transcript. As nucleases may... (15% and 9% of target sites.) How many loci can Cas9 modify? To test the application of this system to...

  5. Multiplex Genome Editing with CRISPR-Cpf1

    Type
    Blog Post
    Published
    May 9, 2017, 2:12 p.m.
    ...Single RNA-Guided Endonuclease of a Class 2 CRISPR-Cas System. Cell,163(3), 759-771. PubMed PMID: 26422227...Comparing the Cas9 and Cpf1 CRISPR Nucleases   Cas9 Cpf1 Components crRNAtracrRNACas9 crRNACpf1 ... guide page for a review of Cas9.  For a brief comparison of Cpf1 vs. Cas9, see the table below. Table... Endonuclease size spCas9: ~4 kbsaCas9: ~3 kb ~3.9kb crRNA/gRNA length gRNA: ~100 nt crNA: ~42...promoters).  spCas9 and its gRNAs are also larger than their Cpf1 counterparts. Table 2. Cas9 Multiplexing...Lentiviral Expression Cassettes lentiviral transduction One vector expresses Cas9, eGFP, and up to 4 ... Requires co-transfection of Cas9 Nissim et alTsai et al PTG Cassettes transfection gRNAs expressed ...

  6. CRISPRainbow and Genome Visualization

    Type
    Blog Post
    Published
    Feb. 28, 2017, 3:30 p.m.
    ...Loci in Living Human Cells by an Optimized CRISPR/Cas System.” Cell 155 (2013): 1379-1491. Pubmed PMID:... a colorful Cas9 toolbox, Ma et al. turned to SpCas9 and its orthologs NmCas9 and St1Cas9. Each ortholog...locus, and to do so in vivo. Catalytically dead Cas9 (dCas9) cannot induce gene editing, but it retains its...bright-field image. Image from Ma et al, 2016. Using dCas9 to visualize genomic loci in vivo The flexibility...By using a gRNA to target fluorescently labeled dCas9 to a given genomic locus, you can track the localization...to noise ratio of the system, they modified GFP-dCas9 and the gRNA scaffold to enhance complex assembly...amount of background fluorescence from unbound GFP-dCas9. With these improvements, labeling efficiency was...

  7. Antibodies 101: Fab Fragments

    Type
    Blog Post
    Published
    Sept. 5, 2024, 1:15 p.m.
    ...References and resources References Bates A, Power CA (2019) David vs. Goliath: The Structure, Function...anti-IgG Fab fragments make good secondaries for cases where you need to pre-form primary-secondary antibody...antibody recognizes endogenous antigens. In these cases, even though one full antibody may be able to get...

  8. Plasmids 101: Modular Cloning

    Type
    Blog Post
    Published
    March 12, 2024, 1:15 p.m.
    ...libraries depend on many gRNAs delivered with a relevant Cas nuclease. MoClo can be used to assemble multiplexed... part, will behave in a cell. For unpredictable cases, MoClo provides two answers: first, sets of parts...

  9. Antibodies 101: Affinity Reagents

    Type
    Blog Post
    Published
    April 14, 2022, 1:15 p.m.
    ...Elsevier Science & Technology Books. Bates A, Power CA. David vs. Goliath: The Structure, Function, and ...

  10. Hot Plasmids and Viral Preps - March 2021

    Type
    Blog Post
    Published
    March 23, 2021, 1:15 p.m.
    ...They're used to determine the PAM requirements of Cas enzymes. CRISPR-ARE is a new system from Jiazhang...and editing with a single Cas9-VPR in Saccharomyces cerevisiae. To control Cas9 activity and influence DNA... editor targets DNA (via catalytically inactive dCas9) to modify chromatin. A fluorescent protein can ...CRISPR system developed by Taekjip Ha’s lab where Cas9-gRNA complex binds the target DNA without cleavage...cleavage until it's activated by light. Once activated, Cas9 cleavage can induce DSBs within minutes. New CRISPR...Jacobs-Wagner’s lab produce different levels of dCas9 expression and contain different antibiotic resistance... lab developed a chemogenetic system that brings Cas9 to ubiquitin ligase for degradation.      New...

  11. Plasmids 101: FLEx Vectors

    Type
    Blog Post
    Published
    April 28, 2016, 2:30 p.m.
    ...Central PMCID: PMC2593125. 4. Saunders A, Johnson CA, Sabatini BL. 2012. Novel recombinant adeno-associated... switch conditional knock-in cassette. As shown in Figure 2, the cassette should contain a reporter DNA...For this FLEx switch to successfully work, the cassette would need to contain the BFP coding sequence ...antisense orientation (Figure 1, top). The entire DNA cassette would be flanked by two pairs of target sites-...in the opposing orientation, you have created a cassette that will express GeneR only in the presence of...recombination event would excise the reporter from the cassette, allowing for expression of GeneR. This allows...

  12. Experimenting in an Open Source lab: from CRISPR to Cats

    Type
    Blog Post
    Published
    July 23, 2015, 2:30 p.m.
    ...contributed by Derek Jacoby from Makerspace Victoria, CA Over the decades science has become increasingly ...with  Addgene. We now have the incredible CRISPR/cas9 tools at our disposal to to modify the worm genome...be useful to our model  so that we can use CRISPR/cas9 to build the mutants, analyse their motor behaviour...project, but the primary goal is learning in this case.   Funding Makerspaces One of the main challenges...- everyone contributes each month - with only occasional supplementation with grant funds, money is always...

  13. Capturing a Moment with Marc Zimmer’s “The State of Science”

    Type
    Blog Post
    Published
    July 30, 2020, 1:15 p.m.
    ...fast, and cheap distribution of the newest CRISPR-Cas plasmids, has been a key driver of the technology...complete without the inclusion of some interesting case studies, and Zimmer provides several. In Part Three...winners for developing the technology. Though these case studies are “old,” they lead Zimmer to one of his...research, how they conduct their research, and in some cases, if they conduct their research. Even if Zimmer ...

  15. Uncovering Ancestral Bias in CRISPR Research

    Type
    Blog Post
    Published
    Nov. 29, 2022, 2:15 p.m.
    ...pieces of RNA that bind to a cell’s DNA, telling the Cas machinery where to cut.      Fig. 2: Heatmap... the guide from binding to the genome or prevent Cas9 from cutting, both of which can introduce significant... are undercounted by approximately 20%. In some cases, this may lead researchers to deprioritize genes...

  16. Hot Plasmids and Viral Preps - May 2021

    Type
    Blog Post
    Published
    May 18, 2021, 1:15 p.m.
    ...anti-CRISPRs were identified that inhibit the S. aureus Cas9, a Cas protein that is smaller and easier to deliver...CRISPR/Cas9 constructs. zCas9i is a high efficiency intron-optimized SpCas9-coding gene. SlugCas9 is a ...promoters driving expression of Cas9 were used in this study.  The zCas9i cloning kit is a plant cloning... of the population.  Because indel generation by Cas9 can occur at a steady rate, scientists found a way...a compact Cas9 ortholog from Staphylococcus lugdunensis that recognizes a NNGG PAM and has comparable ...comparable activity to SaCas9. A new yeast inducible CRISPRi library - Ampl133 targets S. cerevisiae genes with...

  17. Addgene's Cancer Collection Pages Connect the Research Community

    Type
    Blog Post
    Published
    Sept. 6, 2016, 2:30 p.m.
    ...Gateway Cloning Platform (Life Technologies, Carlsbad, CA) that represents 180 genes from the Ras signaling...work. Both cases yield the same result – uncontrolled movement of the vehicle or, in the case of cancer... a global scale, tens of millions of new cancer cases arise and millions of people die from cancer-related...and brake pedal of a vehicle, respectively. In the case of a mutation that turns a proto-oncogene permanently... pathway and be eliminated from the body. In the case of cancer, however, the apoptotic pathway is circumvented...

  18. MXS Chaining

    Type
    Blog Post
    Published
    Feb. 7, 2017, 3:30 p.m.
    ...Gibson DG, Young L, Chuang RY, Venter JC, Hutchison CA, Smith HO.Enzymatic assembly of DNA molecules up ...sequences. Intermediate chaining products (called “cassettes”) can be readily reused in the assembly of any...any later construct (i.e.,functional cassettes are recyclable) Can only work if the restriction sites used...

  19. Viral Vectors 101: Preparing Pooled Libraries

    Type
    Blog Post
    Published
    July 13, 2023, 1:15 p.m.
    ...CRISPR libraries. The Genome Engineering using CRISPR/Cas Systems Forum- Moderated by the Feng Zhang lab, this...Resources and references References Genome-scale CRISPR-Cas9 knockout and transcriptional activation screening...Brigham MD, Sanjana NE, Zhang F. Genome-scale CRISPR-Cas9 knockout and transcriptional activation screening...

  20. Viral Vectors 101: The Retroviral Lifecycle

    Type
    Blog Post
    Published
    July 27, 2023, 1:15 p.m.
    ...Delivery of Gene-Editing Systems Based on CRISPR/Cas: Current State and Perspectives. Viruses, 13(7), ...molecular biologists working with vectors are, in most cases, interested in transferring genes to mammalian cells...viral protein reverse transcriptase (RT). In the case of a natural virus, both the protein and the genetic...particle, along with its RT-deficient genome. In both cases, the lipid membrane is the only component that is...whatever other tool you chose to express. In the case of a natural virus, this new chromosomal locus is...
Showing: 121 - 140 of 609 results