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Showing: 171 - 180 of 422 results
  1. Antibodies 101: Single Chain Fragment Variables (scFvs)

    Type
    Blog Post
    Published
    June 3, 2021, 1:15 p.m.
    ...?  scFv sequences have traditionally been cloned by amplifying the VLand VH antibody sequences of hybridomas...semi-synthetic or entirely synthetic VL and VH sequences. Phage display also allows for screening scFv ...antibodies. To do this, antibody variable domain sequences are expressed as scFvs and screened with in vitro...assays to select for strong binders. Then the sequences for the variable domains of the selected scFvs...
  2. PCR Applications for Copy Number Variation Assays

    Type
    Blog Post
    Published
    April 26, 2022, 1:15 p.m.
    ...The raw data is then normalized to a reference sequence present in the same amount in all samples (usually...to run multiplex assays, allowing the reference sequence and the gene of interest to be amplified in the...for both the gene of interest and the reference sequence. At the end of the run, each droplet is read as...Complexity of the gene of interest Some gene sequences are harder to amplify and quantify than others...
  3. CRISPR 101: Targeting Non-Coding RNAs with CRISPR/Cas9

    Type
    Blog Post
    Published
    Nov. 14, 2024, 2:15 p.m.
    ... generating insertions or deletions in the DNA sequence. This same approach is effective to target short...very small deletions and insertions in the DNA sequence can completely disrupt expression of the transcribed...Cas9 generates double-strand breaks, a new DNA sequence can be knocked-in, or introduced, into the break...off-target effects since promoter and enhancer sequences remain intact (Engreitz et al. 2019). The interactions...
  4. Addgene Receives NIH BRAIN Initiative Grant to Create Open-Access Recombinant Antibody Resource

    Type
    Blog Post
    Published
    May 25, 2021, 2:29 p.m.
    ...use a plasmid if it didn’t include any plasmid sequence data? Of course not. Unfortunately, the vast majority... majority of antibodies are supplied with no sequence information, leading to problems with reproducibility...affinity reagent screening, and next-generation sequencing of hybridomas have opened the door for a new ...
  5. Rewiring Metabolic Circuitry with CRISPR RNA Scaffolds [Video]

    Type
    Blog Post
    Published
    April 7, 2015, 4:21 p.m.
    ...sgRNA) that bears complementarity to a 20bp target sequence (Qi et al. 2013). Modifying the CRISPRi system... will bind to a PAM-adjacent target nucleotide sequence then subsequently recruit a transcriptional regulator...Repurposing CRISPR as an RNA-guided platform for sequence-specific control of gene expression. Cell, 152...
  6. New CRISPR Tools: Cas7-11 and PASTE

    Type
    Blog Post
    Published
    Feb. 17, 2022, 2 p.m.
    ... a genetic sequence and integrate it into any DNA sequence containing the 38-50 bp sequence recognized...they optimized the specific attachment sites via sequence engineering, enabling even more efficient integration...
  7. Viral Production at Addgene

    Type
    Blog Post
    Published
    Oct. 24, 2023, 1:15 p.m.
    ...please contact us. Full sequencing of the Viral Genome Next-generation sequencing is performed on viral ...genes, and a plasmid encoding adenoviral helper sequences. AAV preparations are purified by iodixanol gradient...genomes isolated from the final AAV preparation. Sequencing results are analyzed to confirm the identity ...
  8. Easi-CRISPR: Generating Knock-In and Conditional Mouse Models

    Type
    Blog Post
    Published
    April 5, 2018, 12:42 p.m.
    ... effective, ivTRT may be more challenging for sequences with complex secondary structure. Today, multiple.... Miura et al. (2018) suggest using a 50-80 bp sequence around the desired insertion site to search for...C-terminal insertion with Easi-CRISPR. Potential guide sequences (arrows) and their PAM (bold highlighted text)... knock-in design may naturally remove the gRNA sequence or place it far from the PAM; if not, you can ...guide. This design also separates the gRNA target sequences from their PAMs, preventing re-cutting after editing...
  9. Plasmids 101: Repressible Promoters

    Type
    Blog Post
    Published
    Dec. 20, 2022, 2:15 p.m.
    ...the activator protein cannot bind the promoter sequence anymore and transcription is turned OFF. Negative...protein is present, but cannot bind the promoter sequence and transcription is ON. Once a co-repressor protein... (TetR) can bind to the tetracycline operator sequences (TetO), preventing transcription. In the presence...binds to promoters containing putative operator sequences (CuO) (linked in groups of 6), allowing transcription...which activate their respective UAS and lexAop sequences but are also regulated by QS and quinic acid. ...
Showing: 171 - 180 of 422 results