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Showing: 1 - 20 of 390 results
  1. The Power Behind NGS Plasmid Validation: seqWell

    Type
    Blog Post
    Published
    April 19, 2017, 3:25 p.m.
    ... and rapid advances in technologies that permit large-scale creation and synthesis (“writing”) of longer...-based sequencing and confirmation of Addgene’s large and growing collection of curated plasmids from ...technique in our partnership with Addgene to sequence large numbers of plasmids. plexWell™ technology overview...sequential “pooled library prep”, in which a relatively large number of samples are subjected to a DNA-barcoding...normalization problem often arises from the fact that large numbers of individual input DNA samples (e.g. a ...measured in time and consumables, can be daunting for large numbers of samples. As mentioned above, one of the... is that normalized libraries are produced from large numbers of samples with a wide range of input concentrations...
  2. Plasmids 101: Secondary Nanobody Toolbox

    Type
    Blog Post
    Published
    Feb. 27, 2018, 2:04 p.m.
    ...together without forming large oligomeric complexes. Antibodies are also too large to be expressed in bacteria...strength. This signal strength is due in large part to their larger size (~10-15 nm), which allows for the...antibody structures. Functional comparison Strong but Large: Advantages of Antibodies One of the main reasons...being big is a double-edged sword. An antibody’s large size creates more distance between the target antigen...ability to penetrate tissue. Because antibodies are large and bivalent, primary and secondary antibodies cannot... to 3 targets (Pleiner et al figure 4D). Unlike large secondary antibodies, small nanobodies do not oligomerize... Poor tissue penetration Less resolution due to larger label displacement Require separate incubation ...
  3. CRISPR 101: Validating Your Genome Edit

    Type
    Blog Post
    Published
    Nov. 3, 2022, 12:15 p.m.
    ... what your desired edit is. Large knock-ins Are you introducing a large insertion, something 20 base ...edit. Most dual guide systems generate a deletion large enough that it can be visualized by running your...guide system.   Fig. 2: Size screening for large deletion events.   Validating knock-in mutations... Pro tip: make sure your PCR amplicon isn’t too large so that you can easily visualize the size shift ...knock-ins A method applicable to knock-ins both large and small is a software very similar to TIDE known...
  4. Degrading DNA with Cascade-Cas3

    Type
    Blog Post
    Published
    Feb. 11, 2025, 2:15 p.m.
    ...single base pairs, to chromosomal inversions and large deletions. Many of these methods rely on Cas9 or...Although seemingly ubiquitous in nature, they are largely underutilized in research settings — mostly a consequence...one stand and cutting the template strand causes large deletions of up to hundreds or even thousands of...proteins naturally bound to the DNA. Cas3 or Cas9? Large genomic deletions can be achieved using Cas9, but...but Cas3 may be a better option. To get large deletions using Cas9, two or more gRNAs must be used along...
  5. Light Sheet Fluorescence Microscopy

    Type
    Blog Post
    Published
    July 16, 2015, 2:30 p.m.
    ...multiple-view reconstruction (5). In order to image large tissue such as cleared rodent brain, the Ultramicroscope...was developed using a stereomicroscope to capture large field-of-views (6). For more comprehensive reviews...specimen makes imaging too slow and unwieldy for large specimens that are millimeters in thickness (8,9...significantly reducing the time it takes to image through a large z-stack (8).  One limitation of LSFMs using single...single side illumination, especially with large tissue, is that any obstacles (e.g. air bubbles or high ...
  6. Enabling Precision Functional Genomics with the Target Accelerator Plasmid Collection

    Type
    Blog Post
    Published
    May 11, 2017, 2:30 p.m.
    ...we developed assays to test large numbers of cancer variants across a large number of genes as systematically...characterization For many years, we’ve hoped that large scale laboratory-based functional experiments that... us from testing this hypothesis: There was no large scale, broadly available collection of mutant cDNA...
  7. CRISPR Meets Synthetic Biology: A Conversation with MIT’s Christopher Voigt

    Type
    Blog Post
    Published
    April 22, 2015, 2:06 p.m.
    ...that you can make a very large number of regulators. That basically means larger genetic circuits that could... could conceivably be as large as natural regulatory networks. Addgene: What kinds of things could we ...repressors, activators. We’ve been putting together very large toolboxes and making them available. We’ll also ... people the complete toolbox for taking on very large genetic engineering projects. Addgene: How easy ...we do as genetic circuits become larger and more complex? Voigt: If you look at all the products of biology...switch-like at all. It’s also difficult to build larger circuits with many guide RNAs connected because...
  8. Four Ways to Package Transgenes That Exceed the Size Limit of Adeno-associated Virus

    Type
    Blog Post
    Published
    Sept. 1, 2020, 1:15 p.m.
    ...Reassembly of fragmented genomes is the key to fitting large genes into AAV First, some history. In 2008, the...sequential homologous recombination approach delivers large donor templates using two sequential homology directed...Auricchio A (2008) Serotype-dependent packaging of large genes in adeno-associated viral vectors results ...Porteus MH (2017) CRISPR-Mediated Integration of Large Gene Cassettes Using AAV Donor Vectors. Cell Reports...Chamberlain JS (2011) Gene Therapy of mdx Mice With Large Truncated Dystrophins Generated by Recombination...Polishchuk R, Auricchio A (2013) Effective delivery of large genes to the retina by dual AAV vectors. EMBO Mol...reproducing these results and determined that even when larger vector genomes are packaged, the physical size ...
  9. What's New in CRISPR - November 2021

    Type
    Blog Post
    Published
    Nov. 18, 2021, 2:15 p.m.
    ...and specify a large intervening deletion. Not only can this method precisely program large genomic deletions.... pyogenes CRISPR/Cas9 system is that it is too large to be effectively packaged into AAV particles for... targeting complementary DNA strands to program large genomic deletions with or without small insertions... of the pegRNAs. PEDAR is capable of correcting larger genomic rearrangements as demonstrated in a mouse...
  10. pSiM24: Simplifying Plant Genetic Engineering

    Type
    Blog Post
    Published
    Sept. 29, 2015, 2:30 p.m.
    ...scientists want to transfer large genes, smaller binary vectors with a larger cloning capacity would be ... most first-generation binary vectors are quite large (>10 kb.) Since transformation efficiency is inversely...pKYLX vectors, respectively, making it ideal for large gene transfer. The M24 promoter provides constitutive...
  11. The Stingy Scientist: How the Baby Gel Box Was Born

    Type
    Blog Post
    Published
    April 15, 2014, 3:11 p.m.
    ...powder pruchased from a pottery supply house.  These large, cheap aliquots could be stored indefinitely at ...science project started when I realized I was pouring large agarose gels for DNA visualization or isolation,...amount of agarose, I could pour a very thin gel on a large glass slide using only surface tension.  It's a ...
  12. Plasmids 101: Protein Expression

    Type
    Blog Post
    Published
    June 7, 2018, 1:17 p.m.
    ...expression systems can be scaled up for production of large amounts of protein. Some drawbacks of insect cell...popular DNA vectors that can be used to produce large amounts of protein in bacterial cells: the pET, ...Yeast are a great expression system to generate large quantities of recombinant eukaryotic proteins. Although... be easily adapted to fermentation allowing for large-scale, stable production of proteins. In general...
  13. Natural or synthetic? How Addgene’s dataset reveals trends in biological innovation

    Type
    Blog Post
    Published
    Nov. 8, 2018, 3:47 p.m.
    ...Now, scientists are beginning to see Addgene as a large data set. Addgene has over 65,000 plasmids in the...protein, their gene sequence may have slight or large variations depending on how closely related these...the only time researchers have used Addgene as a large data set. Alec A. K. Nielsen & Christopher A. Voigt...within the Addgene repository is mammalian, but the largest source of unique gene sequences is Proteobacteria...
  14. CUT&RUN: An Improved Method for Studying Protein-DNA Interactions

    Type
    Blog Post
    Published
    Feb. 13, 2018, 2:51 p.m.
    ...Problems with Chip-seq ChIP-seq typically requires a large amount of input material, cells or tissue, to produce...with cell culture, because it is easy to harvest large quantities of cells. However, when working on specific...situations when it is technically challenging to collect large numbers of cells or when a high degree of signal...
  15. What the HEK?

    Type
    Blog Post
    Published
    April 18, 2023, 1:15 p.m.
    ...293, the most commonly used line expresses SV40 large T antigen and is thus dubbed HEK-293T. Given that... viral production because they express the SV40 large T-antigen. This allows them to replicate viral plasmids...HEKs can also grow in suspension, which allows for large scalability, and can also be adapted for serum-free...
  16. Evolution of Lab Techniques

    Type
    Blog Post
    Published
    June 21, 2016, 2:30 p.m.
    ... is observed. Today Southern blotting has been largely replaced by real-time PCR to answer the same experimental...Southern blotting is labor intensive and requires a large amount of high-quality DNA, real-time PCR has several...discoveries (5, 8). While newer techniques have largely replaced these, these techniques still have useful...bring efficient, low cost methods for sequencing large amounts of DNA quickly and accurately. We're sure...PMCID: PMC4727787. 9. Hunkapiller, Tom, et al. "Large-scale and automated DNA sequence determination."...
  17. Plasmids 101: Gibson Assembly and Other Long-Homology Based Cloning Methods

    Type
    Blog Post
    Published
    March 1, 2016, 3:30 p.m.
    ...insert your gene of interest into a vector with a large tag at the N-terminus, but you don’t have the tag...fairly high, so there is usually no need to screen a large amount of colonies. Excluding the time it takes ...those where the vector that you want to use is very large, has a high GC content, contains a lot of repeats...described recently (Jiang et al. 2015), in which very large fragments of the bacterial chromosome (up to 100...segments CATCH enables one-step targeted cloning of large gene clusters. Nat Commun. 2015; Sep 1;6:8101. PubMed...
  18. Tetbow: Bright Multicolor Labeling for Neuronal Tracing

    Type
    Blog Post
    Published
    Jan. 24, 2019, 2:24 p.m.
    ..., SeeDB2 is not powerful enough for large brain samples. For large brain samples, we recommend pretreatment... to achieve highest expression levels. Clearing large tissues - Fluorescent proteins are very stable in...
  19. With Our New Viral Service, We're Taking CRISPR Further!

    Type
    Blog Post
    Published
    Dec. 6, 2016, 3:30 p.m.
    ... Numbers in the large colored circles are rough approximations of the total number of CRISPR plasmids...of insert) and the reduced titer associated with large inserts can make lentivirus production frustrating... titer of her prep makes it unuseable. With the large size of the SpCas9 nuclease (~4.2 kb) this is a ...
Showing: 1 - 20 of 390 results