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Showing: 41 - 60 of 83 results
  1. What's Your Organism? Expanding Genomic Tools via the NSF EDGE Program

    Type
    Blog Post
    ...which don’t like foreign DNA at all (maybe because they have only 1,700 genes total). Hydra (Celina Juliano...of molecular biology, many scientists do a lot of DNA work but never get to actually manipulate the organism...such that the two plants share RNA, proteins, and DNA. Euprymna scolopes (Joshua Rosenthal) The Hawaiian...reproductive life cycles. One can inject plasmid DNA in the eggs to get transgenic animals. They might...
  2. 3 Tips to Improve HDR Efficiency for CRISPR Editing in Human Cells

    Type
    Blog Post
    ...introducing double stranded breaks (DSBs) into genomic DNA in many cell types and often results in biallelic...homology-directed repair (HDR), a distinct cellular DNA repair pathway. Accomplishing this usually involves...involves simultaneously introducing a homologous DNA repair template, such as a sin­gle-stranded oligodeoxynucleotide...at all, such as when you are editing a non-coding DNA region? To this end we developed a technology called...hundred. From these two steps, you’ll be screening a total of a few hundred clones - Still better than 10.000...
  3. Mycoplasma Contamination: Where Does It Come From and How to Prevent It

    Type
    Blog Post
    ...mycoplasma DNA appears in the form of small clusters, apart from the cellular DNA. Fluorescent DNA staining...staining is another DNA staining alternative. This method uses DNA stains like DAPI and Hoechst 33258 to stain... For this task, you can use PCR based detection, DNA staining, fluorescent tagging, agar plating, etc.... then be detected by a luminometer. Non-specific DNA stains can be added in the infected culture medium...stain all DNA. Some amount of expertise is required in this process because result interpretation might...due to longer incubation periods and affect the total cell viability. Conclusion To sum up, it is always...
  4. 15 Years of Addgene: The Top 15 Plasmids

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    Blog Post
    ...How many times have these plasmids been shared in total? Just over 49,000 times! Their long-lasting popularity...D10A nickase mutant) to nick, rather than cleave DNA. Find pSpCas9n(BB)-2A-GFP (PX461). pSpCas9(BB)-2A-Puro...
  5. New Tool for Lineage Tracing: The ClonTracer Library

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    Blog Post
    ...clones that are present at less than 0.1% of the total population are easily be missed. The ClonTracer ...vectors with roughly 73 million semi-random, 30 bp DNA barcodes that are integrated into target cells' genomes...
  6. CRISPRainbow and Genome Visualization

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    Blog Post
    ... Some researchers have used fluorescently tagged DNA-binding proteins to label certain loci, but this ...depending on the hairpin combination bringing the total number of individual colors to 6. A gRNA with all...
  7. Recombinase-based State Machines Enable Order-dependent Logic in vivo

    Type
    Blog Post
    ...state machines (RSMs), which take on a particular DNA-sequence configuration (state) based on the identity...defined by the sequence within a prescribed region of DNA termed the “register”. Each chemical input to an ...result of their recombination is the excision of the DNA between the sites (Fig. 1B below). Alternatively,...result of their recombination is the inversion of the DNA between them (Fig. 1A below). In the absence of extra...interrogate state with qPCR. The re-arrangement of DNA segments in each state of a register enables the ...instructional text file. What's available at Addgene? In total, we constructed and tested eight two-input RSMs ...
  8. Hassle-free 96-well Format Epitope Tagging Using Cas9 Ribonucleoprotein

    Type
    Blog Post
    ... how proteins interact with one another (or with DNA) to perform diverse biochemical tasks in the cell...-IN” bioinformatics tool for guide RNA and donor DNA design, and implemented our optimised protocols into...to cells: a guide RNA, Cas9 protein, and a donor DNA that contains the tag sequence flanked by homology...CRISPR experiments (in collaboration with Integrated DNA Technologies, USA). These synthetic RNAs can also...csRNP complex formation, a single-stranded donor DNA (ssODN) that contains the tag-encoding sequence and... annealed cr:tracrRNA, and single-stranded donor DNA. The success of the epitope tagging experiment depends...tag-positive cells (tag ICC) as a percentage of total cells in the field (DAPI). Using the ICC assay as...
  9. Cpf1 Update: Comparison to Cas9 and NgAgo

    Type
    Blog Post
    ...distant cousins of well-known Cas9. Cpf1 cleaves DNA in a staggered pattern and requires only one RNA ...Kim et al. Kim et al. also compared the ratio of total off-target to on-target modification for AsCpf1 ...Our CRISPR Guide Pages Check Out MpAgo from the Doudna Lab Find Validated gRNAs ...
  10. Plasmids 101: Secondary Nanobody Toolbox

    Type
    Blog Post
    ... the antibody has an antigen binding site for a total of 2 binding sites per antibody. C) IgG’s are big...23495938. Additional Resources on the Addgene Blog DIY DNA ladders from Penn State University Use Nanobodies...
  11. Cpf1: A New Tool for CRISPR Genome Editing

    Type
    Blog Post
    ...Cas9’s second HNH endonuclease domain. Cpf1 cleaves DNA in a staggered pattern and requires only one RNA ...Kim et al. Kim et al. also compared the ratio of total off-target to on-target modification for AsCpf1 ...
  12. Antibodies 101: Flow Cytometry

    Type
    Blog Post
    ... viability controls such as DNA binding dyes and amine reactive dyes. DNA binding dyes, such as propidium...create a histogram of CD19-containing cells versus total cell number to determine the number of B cells in...membranes as is the case with dead or dying cells. DNA binding dyes are not compatible with protocols that...amine reactive dye, such as LIVE/DEAD stain. Like DNA binding dyes, amine reactive dyes can only pass through...
  13. CRISPR-based Genome Editing Systems For Editing in E. coli

    Type
    Blog Post
    ...plasmids are transformed in E. coli with the donor DNA for editing to take place. Then plasmids are cured.... coli W strain, and 1 Tatumella citrea, with a total of 70 sites edited. We optimized the strategy for...
  14. Antibody Guide

    Type
    Collection
    ...interactions between DNA and protein. Micrococcal nuclease digestion is used to shear the DNA in these assays... uses antibodies to capture protein:DNA complexes. After capture, the DNA is released from the complex...suitable for DNA:histone modifier interactions, which have strong binding between the protein and DNA. Some ...Alternatively, the samples can be normalized to a total protein measurement. Both methods will also serve...light. Shear the samples using sonication to break DNA up into fragments of 300-1000 bps in length. Note...IP section above. Reverse the crosslink, isolate DNA, and perform downstream analysis. Special considerations...gentler but results in non-random fragmentation of the DNA. Controls for capture methods Capture methods should...
  15. Addgene: The First Twenty Years

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    Blog Post
    ...sure you hear it all the time, but Addgene is a totally invaluable resource. I really appreciate the work... plasmid request came on September 8, 2004, for pcDNA-p160MBP, while the first request for a kit came ...
  16. Your Lentiviral Plasmid FAQs Answered

    Type
    Blog Post
    ...psi packaging signal. Viral components typically total <1.5kb, which is rarely more than 30% of the transfer... created for a variety of applications including cDNA expression, shRNA-mediated knockdown, Tet and Cre-regulated...
  17. Tips for a 1st time AAV user (by a Rookie AAV user)

    Type
    Blog Post
    ... cells and media are harvested and purified. In total, this process takes 4-7 days, not counting the time...are present in an AAV prep. AAV samples are first DNaseI digested to remove any residual AAV plasmid that... account for the dilution of the sample for the DNAseI digest. Use good sterile technique when handling...
  18. Lentiviral Guide

    Type
    Guide
    ...maintained and often results in a greater yield of DNA. However, if the plasmid contains a Gateway cassette...plasmids (resulting in a four plasmid system in total). In addition, 3rd generation systems do not use...1 Genome Nuclear Import Is Mediated by a Central DNA Flap. Zennou V, Petit C, Guetard D, Nerhbass U, Montagnier... polypurine tract; recognition site for proviral DNA synthesis. Increases transduction efficiency and ... simple transfections. Is it feasible to express cDNA from a lentiviral transfer plasmids normally used...drive RNA pol III-directed transcription of shRNAs. cDNA expression requires RNA pol II, and thus requires...
Showing: 41 - 60 of 83 results