Skip to main content

We narrowed to 419 results for: SAM-2

Showing: 261 - 280 of 419 results
  1. Multiple Plasmids at a Low Price: Kits from Addgene

    Type
    Blog Post
    ...wheat germ, HeLa, and Leishmania (Gagoski, et al 2015[2]). The proteins encoded in this set range in size ...to generate Illumina sequencing libraries using a 2-step PCR-based protocol and are compatible with single-end...plasmids used to generate these fusions all use the same restriction enzymes for cloning. Furthermore, some...
  2. Special Delivery: Fluorophore Targeting for FRET Studies

    Type
    Blog Post
    ...establishing the dynamic range of your FRET assay (Figure 2). These labeling methods are freely interchangeable...PMID: 20161833. PubMed Central PMCID: PMC2802762. 2. Dumas, Anaëlle, et al. "Designing logical codon reassignment–Expanding... However, the acceptor doesn’t need to go to the same exact location as the donor. As long as some of ...targeted nearby (such as a neighboring house on the same street as the donor), then FRET measurements are...Ebright, 2001). These Cy/NTA conjugates work the same way as NTA-sepharose beads used for protein purification... binding sites are adjacent to each other on the same protein and a negative control experiment conducted...
  3. Three Tips to Organize Your Lab Notebooks in the New Year

    Type
    Blog Post
    ...that you can easily spot the colors and text. Tip 2: Use electronic to-do lists to access your tasks on...you identify when others have added or removed samples. Once you've taken some time to get organized, ...
  4. Custom CRISPR Screens & the Green Listed Software

    Type
    Blog Post
    ...six different research constellations: Doench/Root (2), Zhang (3), Wu (4), Yusa (5), Wang/Lander/Sabatini...Bioinformatics 33.7 (2016): 1099-1100. PubMed PMID: 28414855. 2. Doench, John G., et al. "Optimized sgRNA design to...validation screen using selected gRNAs extracted from the same or another library. These different approaches could...Listed you can also easily extract gRNAs for the same gene from several libraries, and identify those ...
  5. Bricking Science: Portraying Scientific Reality Through LEGO

    Type
    Blog Post
    ...motion videos is very time consuming; producing a 1-2 minute video takes an entire week of our free time...wrong. Whether it be a bad fridge freezing your samples, or a dysregulated water bath boiling your experiments...researcher doing some experiments in Brazil can have the same issues as one doing experiments in France. We can...
  6. Safe Port in a Storm...How Addgene is Weathering the Pandemic

    Type
    Blog Post
    ...majority of deposited materials to study SARS-CoV-2 would be fully open and available to industry requestors... over.” And we sent the Addgenies home.  At the same time, as Addgene started dealing with this new reality...and keep new projects on track to succeed at the same time. I began approaching science funding organizations...
  7. Six Spooky Science Stories and Halloween at Addgene

    Type
    Blog Post
    ...melanogaster." Molecular and cellular endocrinology 215.1-2 (2004): 1-10. PubMed PMID: 15026169. Soo, Rochelle... 2015). There, it divides into two cells. At the same time, it sucks out its contents (hence the name ...
  8. Antibody Validation for Flow Cytometry

    Type
    Blog Post
    ...of different cell types within a sample to expected labeling (Figure 2). The panel of antibodies used in...then labeled with the antibody in the same tube.     Figure 2: Schematic showing the use of an orthogonal... recognize different epitopes of the same protein, show the same pattern of labeling, this is supportive...detecting the target-of-interest in your assay and sample-of-interest. The approaches available broadly map...determining the selectivity of antibodies for other sample types and for non-surface (intracellular) antigens...protocol used and the abundance of the epitope in the sample, relative to cross-reactive antigens – that is,...approaches used will be different depending on the sample and target type. To start the validation process...
  9. Viral Genome Sequencing - A One Stop Shop for AAV Identity and Serotype Confirmation

    Type
    Blog Post
    ...containing complementary polynucleotide chains. J Virol 9(2): 394-396. Lecomte E, Tournaire B, Cogné B, Dupont...accommodate adeno-associated viral vector (AAV) samples and created a simplified process, termed viral ...parallel, there is a very real risk of mixing up samples, serotypes, or both. Unfortunately, the standard... as [+] and [-] strands that are packaged at the same frequency, we reasoned that, following DNA extraction...
  10. Antibodies 101: Epitope Tags

    Type
    Blog Post
    ...is the most charged, with 5 negatively charged and 2 positively charged amino acids. FLAG tag has been ...endogenous WT levels of the same protein when both are expressed in the same system. Tagging can also aid...EQKLISEEDL) derived from the protooncogene of the same name. The tag has a net negative charge with 4 negatively...
  11. Antibodies 101: Monoclonal Antibodies

    Type
    Blog Post
    ...create a recombinant antibody.     Figure 2: Changes to the heavy chain or light chain genes within...Monoclonal” refers to antibodies that are all of the same isotype and specificity. In other words, monoclonal...recognize the protein even though it is present in your sample. Additionally, there is a lower likelihood that...antibodies that recognize many different epitopes on the same protein - are more likely to have off-target effects...produces high-affinity/high-avidity antibodies. The same hybridoma is then used to produce all lots of the...
  12. AAV Q&A with Tim Miles

    Type
    Blog Post
    ...retransduce a model organism such as mice, e.g. first at 2 months, then at 4 months? Or do antibodies become ... A: It is our understanding that AAV-BR1 has the same genome size restrictions as other AAV. Therefore...somewhat more reliable quantitation. Differences in sample treatment across methods can affect reported titer...that users keep titering method consistent across samples within a project. Targeting Your AAV Q4: Are there...of co-delivering different AAV particles into the same cells in vivo? A: This will be highly dependent ...
  13. Plasmids 101: Methylation and Restriction Enzymes

    Type
    Blog Post
    ...account when simulating a digest as depicted in Lane 2. Controlling methylation Finally, you can control... experiment? The answer to both questions is the same--methylation! Read on to learn about how DNA methylation...companion endonucleases that recognizes and cleave the same DNA sequence if not methylated (if it comes from...Although not all prokaryotic DNA is methylated to the same level, the potential for methylation should be considered...any) of those sites will be methylated. Using the same example plasmid as above (which has the XbaI site...
  14. Illuminating Choices: A Guide to Selecting Fluorescent Dyes and Ligands

    Type
    Blog Post
    ...Methods, 19(2), 149–158. https://doi.org/10.1038/s41592-021-01338-6  Grimm, J. B., Muthusamy, A. K., Liang... ligands can elicit varying degrees of β-arrestin-2 recruitment to receptors, indicating their agonistic...cytoplasmic background signals when used with the same protein (Hayashi-Takanaka et al., 2014). Other dyes...
  15. Addgene's Tips for Plasmid Quality Control

    Type
    Blog Post
    ... and transfer 100 µl of glycerol stock to each of 2 96-well microplates (identical copies, see image above... that consistently receives around 200 new DNA samples every week. Here we will provide an inside look...own plasmids. Staying organized With hundreds of samples coming through our doors, the first step to ensuring...our deposit process, and then we carefully track samples through our lab using barcoded tubes and plates...process. Always sequence verify Once the physical sample and its associated information are at Addgene, ... will catch any errors made during the cloning, sample handling, or sequence assembly steps. All of our...This means that we are sequencing from the exact same stock that we store and distribute from. Of course...
  16. Plasmids 101: NGS Quality Control for Pooled Libraries

    Type
    Blog Post
    ...created for the Brunello library is shown in Figure 2. You can use a small PCR product because the plasmids...point of reference, Addgene commonly prepares NGS samples using both pre- and post-amplification DNA and ...libraries, but any analysis script should return the same output: a spreadsheet of read counts. You can use...
  17. Antibodies 101: ELISA (Enzyme-linked Immunosorbent Assay)

    Type
    Blog Post
    ... adapted to a competitive format. Figure 2: Overview of using Competitive ELISA to quantitatively...wells with an experimental sample allows for detecting one protein from the sample. A direct ELISA has many...require scientists to detect proteins in their samples. One technique that relies heavily on antibodies...principle of an ELISA is that any antigen within a sample adheres to the well (either directly or by binding...antibodies coating the wells to capture antigen from a sample, whereas antigen is bound directly to the wells...protein you are interested in detecting in your sample. When an ELISA kit is ordered, the wells are typically...already coated with the antibody. Then, you add your sample to the wells, and the antibodies bind to your protein...
  18. Plasmids 101: Cre-lox

    Type
    Blog Post
    ..., N. and Hamilton, D. 1981. PubMed PMID: 6276558. 2. Site-specific DNA recombination in mammalian cells...two loxP sites, which can be located either on the same or on separate pieces of DNA. Both 13bp repeat sequences... sites: Inversion: If the loxP sites are on the same DNA strand and are in opposite orientations, recombination... reversed.   Deletion: If the sites face in the same direction, the sequence between the loxP sites is...sites undergo recombination with other sites of the same type, but are not cross-compatible. Using different...
Showing: 261 - 280 of 419 results