Skip to main content
Addgene
Showing: 21 - 30 of 83 results
  1. AAV Vector Quality Control: Going the Extra Mile with NGS

    Type
    Blog Post
    ...sequence all the DNA packaged inside the viral particles (Figure 1). Briefly, packaged DNA is extracted from...into longer DNA contigs without using a reference sequence. The five contigs with the most total reads are...used to identify DNA contaminants in AAV preparations and provide information on these DNA species with exquisite...increases. In addition to human error, fragments of DNA from the helper plasmids or the cell genome can be...determine the identity and serotype of the packaged DNA and look for potential contaminants. The analysis is ...reviewed. As mentioned earlier, it is common to find DNA from the packaging cell genome, bacterial genomes...68544 to validate our method. We then extracted the DNA and processed the mixed sample in our pipeline (see...
  2. Lab Automation at Addgene

    Type
    Blog Post
    ...rate! Automating DNA purification We're developing ways to prep large quantities of DNA because some countries...more efficient. Here, I’ll discuss transformation, DNA purification, and filling vials with agar. I’ll also...Biomek. The FXP id also able to do high throughput DNA preps and other molecular work if we need it to. ...globe, we’re working on ways to send plasmids as DNA as opposed to in live bacteria. For these shipments...shipments, we’ve needed to find a way to purify DNA from many bacterial samples at the same time as opposed...aliquoting. Simply program the pipette with how much total sample you need and the volume of the smaller aliquots...
  3. 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 ...
  4. 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 ...
  5. 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 ...
  6. 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 ...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
Showing: 21 - 30 of 83 results