Skip to main content
Addgene
Showing: 421 - 440 of 521 results
  1. Enhancing CRISPR Targeting Specificity with eSpCas9, SpCas9-HF1, & HypaCas9

    Type
    Blog Post
    ...PMID: 24529477. PubMed Central PMCID: PMC4139937. 3. Anders, Carolin, et al. "Structural basis of PAM-...With this new found structural knowledge, in collaboration with the Joung Lab, they used targeted mutagenesis...edits in mammalian cells and may decrease worries about off target effects in applied and/or therapeutic...at Addgene. Resources on the Addgene Blog Read about Cas9 Homolog Cpf1 Read How Non-Homologous End Joining...
  2. BeHeard Award 2018: Diseases of Glycosylation, Arginine Mutagenesis, & Neural Development

    Type
    Blog Post
    ... The McMurray lab found that low concentrations (≤3 mM) of GdnHCl can functionally rescue multiple Arg-mutant...glycosylation (CDG) are a group of rare inherited metabolic diseases with severe and life-threatening consequences...understood.  In line with this, Prof. Videira and collaborators will use Addgene plasmids to immortalize CDG...discovery led them to investigate the use of a common laboratory chemical, guanidine hydrochloride, as a potential...
  3. Mouse Modeling, Part 2: Breeding and Crossing Mice

    Type
    Blog Post
    ...one locus (e.g. Cre) and heterozygous at the other. 3. Breed your F1 generation Now, your goal is to generate...homozygous alleles at both of your genes of interest. About 1 in 4 mice will be homozygous for the mutation ...Find our Plasmids 101 blog posts Read blog posts about using Cre-lox Read our genome engineering blog posts... posts Resources on Addgene.org Find more about Cre-lox Read our Genome Engineering Guide Learn more...
  4. Plasmids 101: FLEx Vectors

    Type
    Blog Post
    ...Genetic Analyses in Mice. 2004. PubMed PMID: 14723844. 3. Atasoy D, Aponte Y, Su HH, and Sternson SM. 2008.... Blog  Read about Other Means of Genome Engineering Using FLEx AAV Vectors? Learn about Viral Vector ...12665802. 2. Branda, CS and Dymecki, SM. Talking about a Revolution: The Impact of Site-Specific Recombinases...
  5. Tips for Titering Your Lentiviral Preps

    Type
    Blog Post
    ...PMID: 16836756. PubMed Central PMCID: PMC1534021. 3. Zhang, Bing, et al. "The significance of controlled...drawback of this approach is that it can be quite labor intensive. Target cells are transduced with serial...
  6. Immunocytochemistry

    Type
    Protocol
    ... 20, 2022 Workflow Timeline Day 1: Seed cells Day 3-4: Fix and label cells Equipment Pipette controller...a 24-well cell culture treated plate. Seed 5 x 10 3 HeLa cells per well. Allow the HeLa cells to grow ... min in 500 µL PBS on a rocking platform. Section 3: Labeling with antibody Block for 20 min at RT on ...water Microscope slide Anti-fade mounting medium Laboratory wipes 15 mL conical tubes 50 mL conical tubes...paraformaldehyde and follow your institution's laboratory safety guidelines for disposing of waste in the...remove the coverslip. Blot the coverslip with a laboratory wipe to remove excess liquid. Add 1 drop of anti-fade...
  7. 7 Simple Strategies to Resolve Conflicts with Difficult Supervisors

    Type
    Blog Post
    ... make it easy for your supervisor to support you. 3) Explain the problem and leave your emotions out of... I heard about supervisors in all of the above categories. In addition, I also learned about two other...Complainers, who spend most of their time moaning about their troubles, Silent or unresponsive clams, ... students and postdoctoral fellows are hesitant about expressing their ideas, especially if their supervisors...it is interfering with your work. Avoid talking about your emotions, such as frustration or anger, because... like the problem to be resolved You know more about your work than your supervisor does. You can save...Listen to your supervisor’s viewpoint and brainstorm about mutually beneficial solutions Your supervisor might...
  8. AAV Production in HEK293 Cells

    Type
    Protocol
    ...0: Seed cells in CS2 Day 2: Seed cells in CS5 Day 3 (am): Transfect cells Day 7 (am): Harvest cells Equipment...interest Triton X-100 Benzonase/DNAse I (Millipore 71205-3) 40% Polyethylene Glycol 8000 (PEG) + 0.5 M NaCl Cell... PBS and add 35 mL of 0.05% Trypsin/EDTA. Wait ~2-3 minutes for cells to detach. Gently tap the sides ...stir slowly at 4 °C for 1 h, then keep at 4 °C for 3 h without stirring to allow full precipitation. Precipitation... at 4 °C if needed. Transfer the entire sample to 3 x 500 mL conical bottles and centrifuge at 3900 rpm....8-fold. See the recipe for D1 + 0.1 M sorbitol above. Carefully pour off the media into a waste container...in a total of 5 mL of cell lysis buffer (recipe above). Pipet back and forth to resuspend each pellet ...
  9. Lab Automation at Addgene

    Type
    Blog Post
    ...two 96 well plates in just under 3 hours or one 96 well plate in about an hour. Automating vial fiIling... work into finding robots that’ll take a little labor off our hands. Good news! There is probably a machine...96 transformations in one run compared to doing about 50 transformations in the same amount of time by...machinery we have been able to transform 96 samples in about 4 hours with a greater than 95% success rate! Automating...35 minutes compared to a lab assisstant filling about 200 vials in 45 minutes by hand. How can you start...on each tube by hand. We’ll be sure to tell you about more lab updates as we develop them. In the meantime...
  10. Plasmids 101: In-house NGS Plasmid Quality Control Now at Addgene

    Type
    Blog Post
    ...Originally published Aug 3, 2017 and last updated Apr 6, 2021 by Will Arnold. Introducing NGS in 2017...ask the depositing laboratory to review the discrepancies. If the depositing laboratory confirms that these...finish the library preparation process only takes about one day, even for six plates (576 individual plasmids... we perform a 2x251 run on our MiSeq that takes about two days to complete. After the run completes, we..." In some cases, there will be more information about our sequencing results in the Depositor Comments...to note the appropriate barcode for each sample. About 24 hours later we unload the FASTQ data from our...
  11. CRISPR 101: Mammalian Expression Systems and Delivery Methods

    Type
    Blog Post
    ...directly back to your specific goal. When thinking about step 3, however, you may be surprised at the number...Delivery methods for mammalian cell lines As mentioned above, the expression system you choose in many ways dictates.... The user should review the current literature about their preferred model.  If your expression system... Check out our CRISPR Featured Topic Page Learn about CRISPR Delivery Using Ribonucleoproteins (RNPs) ...
  12. Quickest Way to Deposit Plasmids: The Deposit Spreadsheet

    Type
    Blog Post
    ...deposit spreadsheet to complete Step 1. Steps 2 and 3 are usually very easy — our tech transfer team will...streptomycin, tetracycline, combinations of the above, or other. High or Low Copy Choose from: high...the “Purpose” field. If you ever have a question about what should go into a cell, hover over the cell ...Addgene and contact your technology transfer office about the MTA. Pro Tip! Download a new spreadsheet each...
  13. Synthetic promoter AAVs for cell-type specific expression in retinal cells

    Type
    Blog Post
    ...expression and high cell-type specificity.  Strategy #3 (ProC): Create promoters by repeating mouse cell type...Addgene blog Read more about using AAV for retinal gene therapy Find more about precise neuronal targeting...injected into macaques and postmortem human retinas. About 25% of these AAV synthetic promoters successfully...
  14. Tips for Using BLAST to Verify Plasmids

    Type
    Blog Post
    ...more advantageous for your search. Timesaving Tip #3: Note that protein databases available are unlikely...such as full plasmid sequences provided by the laboratories that deposit their plasmids with us or other...mismatches and gaps in the alignment. If you are curious about the differences in the blastn programs, check out...Inside Look at NGS Plasmid Quality Control Learn about our Snapgene-powered plasmid maps. Resources on...
  15. Illuminating Epigenetics with A FRET Based Biosensor

    Type
    Blog Post
    ...PMID: 24552514. PubMed Central PMCID: PMC3929550. 3. Kaati, Gunnar, Lars O. Bygren, and Soren Edvinsson... the histone protein of interest (in the figure above, H3 at K9 or K27). Joined to this by a flexible ... in Your Experiments Post Read Other Blog Posts about Fluorescent Proteins  ...
  16. Molecular Biology Protocol - Restriction Digest of Plasmid DNA

    Type
    Protocol
    ... 1 µg DNA 1 µL of each Restriction Enzyme 3 µL 10x Buffer 3 µL 10x BSA (if recommended) x µL dH 2 O (to... T4 DNA Polymerase or Klenow DNA Polymerase I for 3′ overhang removal and 5′ overhang fill-in. If you ...more at (Link opens in a new window) NEB's website about star activity . If you are digesting a large number...
  17. Gibson Assembly Protocol

    Type
    Protocol
    ...end that is identical to an adjacent segment and a 3′ end that anneals to the target sequence. One strategy...reaction: T5 Exonuclease - creates single-strand DNA 3’ overhangs by chewing back from the DNA 5’ end. Complementary...) to the isothermal reaction mix. ET SSB protects 3’ ssDNA ends from the ssDNA-specific endonuclease activity... the right). When designing your plasmid, think about what DNA segments you will need to join to create...
  18. Molecular Biology Reference

    Type
    Guide
    ...of amino acids. Each amino acid is encoded for by 3 nucleotides termed a codon. As there are only 20 natural.... Uracil replaces thymine in RNA molecules. Every 3 nucleotides (codons) in a DNA sequence encodes for...Reference Page Plasmids 101: How to Name Your Plasmid in 3 Easy Steps Molecular Cloning Techniques Reference ...human genome with restriction enzymes would yield about two million DNA fragments, which is far too many...the molecular biologist’s toolbox. To learn more about different types of cloning methods check out our...restriction enzyme digestion. For more information about restriction enzymes check out NEB's website . Insert...endogenous expression levels). For more information about promoters, both bacterial and eukaryotic, as well...
  19. Virus Protocol - Generating Stable Cell Lines

    Type
    Protocol
    ...Cells Day 2–3 (am): Remove media, replace with fresh media containing selection reagent Day 3–14: Change...300 200 1:10 150 350 1:50 30 470 1:100 15 485 1:500 3 497 Add 0.5 mL of a single viral dilution to each ...cell death, the cell media should be changed every 2–3 days to maintain the dose of antibiotic, which may...cells in the untransduced well (0 µL lentivirus, above) are dying. Perform regular media changes and monitor...
  20. CRISPR 101: Ribonucleoprotein (RNP) Delivery

    Type
    Blog Post
    ...PMID: 25357182. PubMed Central PMCID: PMC4289409. 3. Rouet, Romain, et al. "Receptor-Mediated Delivery...scientists to make genomic alterations, bringing about a revolution in genome engineering, with new techniques...available by both the Jacob Corn and Alex Schier laboratories. Delivering Cas9-gRNA ribonucleoproteins  An...delivery of RNPs is electroporation (A in the figure above), which generates pores in the cell membrane, allowing...as lipid-mediated transfection (B in the figure above), are in the early stages of development. David ...proteins harboring receptor ligands (C in the figure above), which result in the internalization of Cas9-gRNA...show promise for in vivo studies, little is known about the immunogenicity and stability of the Cas9 protein...
Showing: 421 - 440 of 521 results