Skip to main content

We narrowed to 82 results for: total dna

Showing: 21 - 40 of 82 results
  1. Golden Gate Assembly Upgrades: More Fragments, Faster Assembly, and Higher Fidelity

    Type
    Blog Post
    ...restriction enzyme such as BsaI, and a DNA ligase such as T4 DNA ligase. Inserts, either precloned or in...completion of T4 DNA Ligase fidelity studies conducted by Potapov et al. at NEB (1, 2). While T4 DNA Ligase, the... comprehensive profiling of T4 DNA ligase fidelity and bias during DNA end-joining." Nucleic acids research... Gate Assembly is commonly used to assemble 2–10 DNA fragments in a single “one-pot” reaction to form ...junction sequences guided by experimentally-derived DNA Ligase fidelity data. Our work demonstrates that ... and functioning Type IIS restriction enzyme and DNA ligase, any single omission should block the formation...of assembly (percent correct) Calculated colony totals Per 2 μl assembly reaction Per full assembly ...
  2. Google Forums Round Up: First Impressions of NgAgo

    Type
    Blog Post
    ...target any sequence of DNA. Second, NgAgo target specificity is dictated by a DNA guide sequence rather...(2016). 3. "NgAgo: Genome-editing by a DNA-guided enzyme." DNA-scissors (blog). Blog website. 4. Hsu, ...sharing the stage with much-lauded CRISPR-Cas9 is DNA-guided endonuclease NgAgo! We'll discuss how NgAgo...methods have their own pros and cons (2). The NgAgo DNA guide is inexpensive and can be 5’-phosphorylated... Survey Survey results As of August 1, 2016, a total of 165 researchers responded to the survey. When...understanding brain tumor biology. When not snipping DNA, he tries random things (101 lessons on Spanish, ...in Edinburgh.   References 1. Gao, Feng, et al. "DNA-guided genome editing using the Natronobacterium ...
  3. Viral Vectors 101: The Retroviral Lifecycle

    Type
    Blog Post
    ...from a reverse-transcribed piece of DNA called a “provirus.” This DNA is synthesized inside of what is called...Central Dogma of Biology (gDNA → mRNA → protein): their roadmap includes RNA → DNA (Cooper & Temin, 1974)...transferring genes to mammalian cells (i.e. transferring DNA), yet retroviruses are RNA-containing viruses  (Robinson... because they integrate this reverse-transcribed DNA into the host cell’s genome and then use cell machinery...Transduction is often thought of as the integration of DNA into the host cell’s genome (shown in step 3), but...various mechanisms, only one of the two strands’ DNA counterparts from step 2 will be integrated by the...Hu & Temin, 1990). At step 3, the double stranded DNA is integrated into the host chromosome, and this ...
  4. Pooled Library Amplifications

    Type
    Blog Post
    ...Library. DNA and cell amounts After deciding on a cell type, you will need to determine how much DNA and how...electroporator uses, etc. The DNA amount can be anywhere from 10 ng to 1 μg of DNA. It often correlates with...transformation(s). The amount of competent cells you need total and per transformation may vary depending on the... libraries that require hundreds of nanograms of DNA, you will likely need to perform several individual...individual transformations, such as splitting 400 ng of DNA in 100 μL of cells over four individual electroporations...Name Number of Plasmids Variable Region Size DNA per Amplification Amplification Type Link to ...the Zhang lab, and the Broad Institute’s general pDNA Library Amplification protocol are useful references...
  5. REPLACR Mutagenesis: Replacing In Vitro Recombination Methods

    Type
    Blog Post
    ...plasmid. The parental, nonmutated DNA is digested with methylated DNA-specific enzyme DpnI, and the nonmethylated...efficiency of mutagenesis (mutation-containing colonies/total colonies) is about 84% for each of the three methods...which are proprietary. These methods also rely on ssDNA ends to match up regions of homology, so they won...
  6. Plasmids 101: Stringent Regulation of Replication

    Type
    Blog Post
    ...nearby AT-rich regions of DNA. In a test tube, the DNA helix can be separated by DnaA alone, as long as there... ori. In the elongation phase, a DNA polymerase synthesizes a new DNA strand at each replication fork....present in the chromosomal DNA ensure that the helicases are released from the DNA once the replication forks...Mechanisms and Controls of DNA Replication in Bacteria. In Fundamental Aspects of DNA Replication. IntechOpen...allowing lower levels of DnaA to get the job done.   Figure 1: DNA melting by DnaA and IHF is the first...regulate DNA replication. DnaA negatively regulates its own expression, so high levels of DnaA act as a...assists with the process: it bends the DNA to redistribute the DnaA from high-affinity boxes to low-affinity...
  7. Human Germline Editing Using CRISPR

    Type
    Blog Post
    ...gRNA, they noted low editing efficiency, with a total targeting efficiency of only 27.9% and homology-...oocytes, thus allowing repair to take place before DNA replication. Indeed, they observed that 41/42 embryos...editing.’ While repair using endogenous chromosomal DNA is appealing for heterozygous mutations, it will ... homozygous mutations. Moreover, introducing new DNA seems impossible with current tools, thus quieting...
  8. How to Deposit Your Plasmids with Addgene

    Type
    Blog Post
    ...Pooled libraries are normally supplied as liquid DNA with all of the plasmids in the library in a single...the help center article, "Can I deposit a pooled DNA library with Addgene?" or contact us at [email protected]... to your plasmid. It is optional to include the total size of the insert and the GenBank ID associated...vector backbone manufacturer, vector backbone size, total size of your vector + insert, any modifications ...Essentially, plasmids can be submitted as 15 µL of DNA in a 1.5 mL microfuge tube at a concentration of ...
  9. CRISPR 101: Cas9 Nickase Design and Homology Directed Repair

    Type
    Blog Post
    ...In this post, we’ll summarize how IDT (Integrated DNA Technologies) first demonstrated how CRISPR nickases...cells. They started by comparing D10A and H840A total editing efficiency in PAM-in and PAM-out configurations...insertions (long ssDNA; IDT Megamer® ssDNA Fragments) Test both bottom and top strand ssDNA donors (if possible...longer insertion (mCherry) using IDT Megamer long ssDNA with 100 nt homology arms. Schubert and Yan next...
  10. Harnessing TnpB for Genome Editing: A Compact and Versatile Tool for Your Research

    Type
    Blog Post
    ... is complementary to the DNA target. The 20-nt guide region binds to the DNA sequence immediately downstream... types, it has a limited capacity to carry large DNA cargos. As a result, the search for smaller, compact...single RuvC-like domain. In simple terms, Cas9 cuts DNA using two "scissors" (one for each strand), while...PAM (protospacer adjacent motif) near the target DNA, TnpBs also need a short sequence motif called a ...reRNA) or omega RNA (ωRNA) guide the TnpB to its DNA target, much like the single guide RNA (sgRNA) used...downstream of the TAM. This RNA-DNA hybrid formation recruits TnpB to the site and activates its nuclease...nuclease function. Once bound, TnpB cleaves the DNA at a position 15–21 base pairs downstream of the TAM, creating...
  11. AAV Titers: Where Do They Come From And What Do They Mean?

    Type
    Blog Post
    ...ddPCR) Historically, a quantitative DNA hybridization method (DNA dot blotting) had been used to titrate... as opposed to purified DNA. This may be mitigated by using purified viral DNA as the template instead...the category: ELISA...qPCR...Digital droplet PCR...DNA dot blot...Transduction assay...SDS-PAGE...Electron...concentration of viral genomes (by qPCR or other DNA quantification methods - see below), since each viral...genome-containing viral particles relative to the total number of viral capsids (which can include empty... digital PCR system for absolute quantitation of DNA copy number." Analytical chemistry 83.22 (2011): ...
  12. 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...
  13. Plasmids for Endogenous Gene Tagging in Human Cells

    Type
    Blog Post
    ...GFP tag and 1kb of homologous DNA flanking both sides (about 2.7kb total)—is inserted into a plasmid backbone... a donor plasmid that contains long stretches of DNA on either side of the fluorescent protein sequence...
  14. CRISPR 101: Off-Target Effects

    Type
    Blog Post
    ...vectors - which rely on insertion of DNA by the NHEJ pathway during DNA repair of the break to allow for ...either introduces a ssDNA nick, a dsDNA break, or is engineered not to cleave DNA and instead activates...an experiment. For CRISPR work, this often means DNA cleavage at unanticipated sites. While off-target...genomic locus must often be proximal to a PAM site for DNA cutting to occur. The RNA sequence and PAM site confer...more. While such software typically only considers DNA sequence and doesn’t take into account chromatin ...only reduce off targets where nicking/cleaving of DNA occurs, not for deadCas activator/repressor experiments...generated near each other, this will result in a DNA double strand break (DSB), the event required for...
  15. Plasmids 101: Colony PCR

    Type
    Blog Post
    ...thermocycling program. One key difference is the plasmid DNA must be released from the bacteria in order to serve...amount of sterile water.  Pick 3-10 colonies in total to test, depending on the number of background colonies...need to lyse the bacteria to release the plasmid DNA by either briefly boiling the sample before use or... of the junctions between the plasmid and insert DNA. Colony PCR will greatly reduce the number of clones...
  16. CRISPR 101: Multiplex Expression of gRNAs

    Type
    Blog Post
    ...to express multiple gRNA from a single construct. DNA and gRNA are not to scale.   Let’s start with... different destination vectors depending on the total number of gRNAs you wish to clone, from 2-7. For...destination vectors are used depending upon the total number of gRNAs you wish to clone, so you don’t ...cytidine deaminase fusion with Cas9 with a uracil DNA glycosylase inhibitor with a degradation tag (LVA...
  17. Beyond the Blood Brain Barrier: PHP.B Enters the Central Nervous System Via the LY6A Receptor

    Type
    Blog Post
    ...independently searched for this unique sequence of DNA and both identified lymphocyte antigen 6 complex ...receptor for PHP.B by looking for a unique sequence of DNA that was present in mice whose CNS was transduced...expression, mRNA splicing, or protein coding regions. In total, they tested 13 strains, with seven strains identified...chromosome. Of the genes located in this stretch of DNA, Ly6a seemed the most likely candidate due to its...
  18. Improved Plasmid Maps Powered by SnapGene

    Type
    Blog Post
    ...computer. Maps, sequences, & downloadable .gb & .dna files Once you’ve identified a plasmid that you want...where the enzymes will cut (in basepairs), and the total number of times they cut. Use the filters on the...
  19. Hot Plasmids: Summer 2024

    Type
    Blog Post
    ...landing sites on opposite DNA strands. When the prime editor releases the DNA, the two 3’ flaps containing...previously-reported technique for precisely integrating large DNA sequences into a genome (Anzalone et al., 2022). ...prime editing and twin prime editing can integrate DNA cargoes of 80–100 bp, PASSIGE can integrate cargoes...other, while the 5’ flaps containing the original DNA sequence anneal with each other. Excision of the ... replacement, integration and inversion of large DNA sequences with twin prime editing. Nature Biotechnology...epigenetic editor consisting of dCas9 fused to a DNA methyltransferase — that can drive lasting transcriptional...methyltransferase. The strategy is generalizable to a variety of DNA-targeting proteins, so the team created versions ...
  20. 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...
Showing: 21 - 40 of 82 results