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We narrowed to 960 results for: comp

Showing: 541 - 560 of 960 results
  1. New Tools Enable CRISPRa for Neuroscience Applications

    Type
    Blog Post
    ... Rochester Medical Center. During development, complex genetic programs specify and assemble diverse arrays...genetic underpinnings of these processes has been complicated by the lack of precise genetic tools for modulating...are needed to deliver all the protein and RNA components, and several sgRNAs must be screened to identify...eBook Resources on Addgene.org Check out our comprehensive CRISPR guide Find CRISPR plasmids and resources...
  2. The PAM Requirement and Expanding CRISPR Beyond SpCas9

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    Blog Post
    ...target provided that (1) the sequence is unique compared to the rest of the genome and (2) the sequence...for the canonical S. pyogenes PAM sequence NGG compared to wild-type SpCas9, which also displays some ...CjCas9) is even smaller than SaCas9 and is also compatible with AAV delivery. NmCas9, another small ortholog...(2018) Evolved Cas9 variants with broad PAM compatibility and high DNA specificity. Nature 556:57–63 ....
  3. Hot Plasmids - August 2020

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    Blog Post
    ...fluorescent tools for labeling structures and compartments in mammalian cells By Angela Abitua Genetically...are often used to label  specific structures, compartments, or specific localization of biomolecules within...usually much easier to clone, express, and purify compared to antibodies. Nanobodies are easily expressed...plasmids were expressed in SHuffle T7 Express competent E.coli (NEB) using IPTG induction. To biotinylate...
  4. CRISPR 101: Which Cas9 Do I Choose for My CRISPR Experiment?

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    Blog Post
    ...meets two conditions:  1) The sequence is unique compared to the rest of the genome.  2) The target is present...found. If you’re lucky enough to find a SpCas9 compatible PAM at your site of interest, that is the most...expanding number of Cas9s with looser PAM requirements compared to SpCas9. xCas9 has a PAM requirement of NG, ... proteins. The Synergistic Activation Mediator complex, generally the strongest activator, consists of...
  5. Plasmids 101: Gateway Cloning

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    Blog Post
    ...reaction creates an expression clone with all of the components necessary for gene expression.     The LR... are performed, the next step is to transform competent E. coli cells and select the positive clones. ...functional. Advantages of the Gateway cloning method Compatibility and flexibility Once you generate the entry ...have generated and deposited their own Gateway-compatible plasmids with Addgene. These can be used to express...
  6. CRISPR Activation: A Practical Guide

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    Blog Post
    ...can be difficult to construct and deliver when compared to gRNAs. Additionaly, cDNAs cannot be used to...Housden BE, Perrimon N, Collins JJ, Church G (2016) Comparison of Cas9 activators in multiple species. Nat Methods...transcriptional activation by an engineered CRISPR-Cas9 complex. Nature 517:583–588 . https://doi.org/10.1038/nature14136...Kadoch C (2018) Interrogation of Mammalian Protein Complex Structure, Function, and Membership Using Genome-Scale...
  7. The Advances Behind The World's First Personalized CRISPR Treatment

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    Blog Post
    ...between research hospitals, universities, private companies, and federal regulators. But the speed is impressive...which could be repaired with an A→G edit on the complementary strand. But the invention of base editing doesn...approval, as well. If the editor and delivery components could be rigorously safety tested and reused,...adenine base editor with improved Cas domain compatibility and activity. Nature Biotechnology, 38(7), 883...
  8. Viral Vectors 101: Integrase-Deficient Lentiviral Vectors

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    Blog Post
    ...the production of lentiviral vectors that are competent for one round of infection (AKA transduction in...progeny are produced (Figure 1).  Figure 1: Comparison of the life cycle of a lentiviral vector with...double-stranded DNA transgene is incorporated into a large complex of both viral and cellular proteins and trafficked...titering IDLVs include detecting vector particle components or performing quantitative PCR titration of vector...
  9. Fluorescent Proteins 101: When GFP lets you down

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    Blog Post
    ...to the popularity of GFP including (i) fast and complete maturation to functional, fluorescent protein ...diameter of about 2.4 nm (Hink et al., 2000). The complete beta-barrel is necessary for its fluorescence ...genetically encoded tag and exogenously added components. For a review see Lotze et al. (2016). To date...is used to excite GFP, may also excite several components that are naturally present in cells or media....
  10. Harnessing Bacterial Toxins for Allelic Exchange

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    Blog Post
    ...endogenous homologous recombination enzymes can also accomplish the desired genomic modification. This technique... which results in a merodiploid. This can be accomplished by selecting for an antibiotic resistance marker...scarless modification of bacterial genomes. It can accomplish large deletions, insertions, and even precise...PMC4513841. Latynski US, Valentovich LN. "DNA tuner: a computer program for the construction of polylinker sequences...
  11. Antibodies 101: Single Chain Fragment Variables (scFvs)

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    Blog Post
    ... (Sandomenico et al., 2020). Figure 1: Comparison between the IgG antibody and scFv.   What...their lack of an Fc region. Disadvantages scFVs:  Compared to antibodies, scFvs tend to have lower affinities...intensity of a tagged protein. SunTag has two components: 1) a protein of interest that’s tagged with ....0000000000000145  Gąciarz A, Ruddock LW (2017) Complementarity determining regions and frameworks contribute...
  12. CRISPR 101: Validating Your Genome Edit

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    Blog Post
    ...method for knockouts is Tracking of Indels by Decomposition (TIDE) (Brinkman et al., NAR). This technique...trace files of WT and edited cell lines. Then decomposition analysis is performed yielding a graph of edits...This method requires a set of control cells to compare the sequencing reads from your edited sample to...assessment of genome editing by sequence trace decomposition. (2014) Nucleic Acids Research Volume 42, Issue...
  13. Fluorescent Proteins 101: GFP Fusion Proteins - Making the Right Connection

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    Blog Post
    ... proteins in living cells and organisms. Both components of the chimera are encoded by DNA. Since researchers...When both orientations are available, a direct comparison of these fusion proteins may reveal which of ...the fusion protein can be verified and it can be compared to what is expected based on immunofluorescence...interactions) can be challenging. If a fusion can complement a knock-down or knock-out of the corresponding...
  14. Plasmids 101: Common Lab E. coli Strains

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    Blog Post
    ...lacY1 proA2 rpsL20 xyl-5 leu mtl-1 Stbl4   Electrocompetent cells for cloning and storage of unstable ...XL10 Gold Tetracycline and Chloramphenicol High competency cloning and propagation of large plasmids, ligated...tables are by no means exhaustive! For a more comprehensive list and additional information, visit OpenWetWare's...of Bacterial Expression Systems. Check out our companion post describing protein expression strains, where...
  15. CRISPR 101: Off-Target Effects

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    Blog Post
    ...certain Cas enzymes are less compatible with the bulkiness that accompanies mispairing of bases. To reduce...unnecessary for many applications, it is the only comprehensive method available. Targeted sequencing approaches...must be quantified slightly differently. For a comprehensive approach, RNA-seq would be an appropriate method...
  16. Viral Vectors 101: Optogenetic Tools

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    Blog Post
    ...what if you’re interested in studying specific components of those signaling pathways? Here’s where photoswitchable...stimulation. GPCR signaling GPCR signaling is a complicated process involving many downstream signaling mechanisms...applying optogenetic tools derived from direct comparative analysis of microbial opsins. Nature Methods,...
  17. Antibodies 101: Multiplex Immunofluorescence

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    Blog Post
    ...helps all viewers, especially if you have some complex patterns with several overlapping targets to interpret...you add the secondary antibody, it should get completely washed away and leave no signal. If you see lots...samples where you label only one target in each. Compare these individually-labeled samples with the results...deep phenotyping and spatial analysis of cells in complex tissues. Proceedings of the National Academy of...
  18. Antibodies 101: Antibody Engineering and Directed Evolution

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    Blog Post
    ...equipment on a lab bench. The best part? Less complicated math. Bioengineering is a field that has been...achieve whatever goal you’re aiming for. When you complete each cycle, your best-performing mutant is usually...or predicted structure of your antibody-antigen complex as a template. This structural framework then guides... a plate-based format, making it suitable for comparing relative affinities across mutants. Cell surface...
  19. Tips for a 1st Time CRISPR User (by a 1st Time CRISPR User)

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    Blog Post
    ...could avoid potential off target artifacts by comparing the phenotypes of multiple gRNAs. Targeting different...lanes 0.3 % 3.0, Figure 5, lane 2) is faint, so comparing it to the undigested control (Figure 4, lane 0...instead of agarose gives much sharper bands. I compared two MOIs of gRNA transduction to see if that had...testament to how far genome engineering has come. For comparison, in 2007 it took about 3 months to knockout a...
  20. Protocol - How to Streak a Plate

    Type
    Protocol
    ...white dot growing on the solid medium. This dot is composed of millions of genetically identical bacteria ...
Showing: 541 - 560 of 960 results