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Showing: 81 - 100 of 958 results
  1. Antibody Guide

    Type
    Guide
    ...applications common to each category, including an outline of the basic steps needed for each application, important...different isotypes for each primary antibody and secondary antibodies specific to each isotype. Overview of...confusing data. Check that your machine has appropriate lasers and filters for each fluorophore you select. Suggested... itself prior to antibody production; therefore, each B cell only produces one type of antibody. Monocultures...enable higher production of a single antibody, but each B cell can only produce one variable region. Isotypes...-antibody units, while others exist as monomers. Each antibody class therefore has a valency, or number...typically the number of antibodies multiplied by two, as each antibody has two binding sites. Isotype Description...
  2. Molecular Biology Reference

    Type
    Guide
    ...separated. These attached DNA templates are then amplified again, producing ~1,000 copies of each template. ...fluorescent color that is emitted each time a base is added. Again, each base (A,C,T, or G) is labeled with a different...into proteins. Proteins are made up of amino acids. Each amino acid is encoded for by three nucleotides, ...coined the term plasmid, in reference to any extrachromosomal heritable determinant. Plasmids are fragments...plasmid DNA is replicated upon cell division, and each daughter cell receives at least one copy of the ...replication in bacteria by recruiting DNA replication machinery. The ori is critical for the ability of the plasmid...insert. The promoter recruits transcriptional machinery and can be specific to a certain species, tissue...
  3. CRISPR Guide

    Type
    Guide
    ...technologies. Before CRISPR, genome engineering approaches like zinc finger nucleases (ZFNs) or transcription-activator-like...rapidly became the most popular genome engineering approach. Engineered CRISPR systems contain two components...the ways the CRISPR components are leveraged to achieve specific goals, such as targeting multiple genomic...gRNAs into a single plasmid — though some have achieved targeting in the double digits. These multiplex...nickase system is utilized in many CRISPR systems to achieve specific genetic edits. The dCas9 molecule binds...termed left and right homology arms). The length of each homology arm depends on the size of the change being...system, the Cas effectors lack nuclease activity. Each system also includes Tn7-like transposase components...
  4. Molecular Cloning Techniques

    Type
    Guide
    ...that span each junction. These oligos should be 60–80 bp long, with 30–40 bp of homology to each of the ...move around pieces of DNA. Oftentimes several approaches will work for any specific cloning project; however...for any given project there is usually an ideal approach. This may be due to speed, cost, availability ... of time required for cloning. To utilize this approach, the fragment of DNA that you would like to clone...amplified with specific Gateway attB1 and attB2 sites attached to the 5’ and 3’ ends of the DNA sequence. This...fragments, generating long overhangs that anneal to each other due to their homology. Second, DNA polymerase... enzyme cloning. Scientists have utilized this approach to create compatible custom overhangs that can...
  5. Optogenetics Guide

    Type
    Guide
    ...) until peak expression of the opsin is reached. This approach is especially powerful when combined with...reporters of molecular signals). These areas have each since grown and developed into their own fields....including a brief overview of the wild-type opsin of each and some examples of relevant variants. This list...closing of the channel 470(activ.), 590(inact.) ReaChR Red-activatable variant of CrChR2 590 Channelrhodopsins... variant 467 Aurora Red-shifted anion-selective ReaChR variant 517 Halorhodopsins Jaws Red-shifted, light-driven...Generally, the most robust and stable expression is achieved in a transgenic mouse line, such as for example...that bind to the LOV domain only in the dark. attaching only one member of the Zdk/LOV2 pair to the target...
  6. Plan Your Experiment

    Type
    Guide
    ...specificity Dual-nickase approach increases specificity but is less efficient Each putative knockout allele... strategies for designing the gRNA component for each category. Genetic Manipulation Application Cas Enzyme...SAM system Activate Design and Clone Your gRNA Achieving your desired edit comes down to location, location...transient or stable). For plasmid and viral-based approaches, the species and expression pattern of the promoter...cationic lipids, electroporation, or an endosomal approach. Similar to the mRNA method described above, this...Furthermore, in cells containing two mutated alleles, each mutated allele may be different owing to the error-prone...verify that your cells contain your desired edit. Each of these methods has their own considerations. Which...
  7. Lentiviral Vector Guide

    Type
    Guide
    ... packaging genes and accessory genes specific to each virus type, while retroviruses only contain packaging... thousands of target genes and require gRNAs for each target. Lentiviral vectors are a common way of delivering...doi.org/10.1126/science.272.5259.263 PMID: 8602510 Schambach, A., Zychlinski, D., Ehrnstroem, B., & Baum, C... (1997). Multiply attenuated lentiviral vector achieves efficient gene delivery in vivo. Nature Biotechnology...comprised of a U3-R-U5 structure and are found on each side of the provirus. The U3 (unique 3’) contains...
  8. Adeno-associated virus (AAV) Guide

    Type
    Guide
    ...replication as it activates the necessary cellular machinery to produce large amounts of rAAV vectors. The ...molecular weight structures that are maintained extrachromosomally. Random integration of rAAV genomes in non-homologous... vector depends on the cell’s DNA replication machinery to synthesize the complementary strand, transgene... Having the shape of a polyhedron with 20 faces, each being an equilateral triangle. Immunogenicity The...replication process where the virus uses the cell machinery to produce new viruses, eventually lysing the ...
  9. Guide to Using Pooled Libraries

    Type
    Guide
    ...cDNA libraries, each plasmid contains a unique cDNA. In shRNA or gRNA libraries, each plasmid contains...sequence, but there are multiple sequences targeting each gene in the overall library. Barcoding libraries...negative results — for a given plasmid, think of each cell carrying it as being a biological replicate...
  10. Chemogenetics Guide

    Type
    Guide
    ...engineered α7 nicotinic acetylcholine receptor (nAChR) domains that respond to specific small molecules...Adeno-associated virus (AAV) is a widely-used tool for achieving in vivo expression of chemogenetic receptors. ... our AAV guide . FLEx Vectors are also used to achieve cell-specific expression of AAV-encoded chemogenetic..., B. L., & Wess, J. (2009). A chemical-genetic approach to study G protein regulation of β cell function...
  11. Modular Cloning Guide

    Type
    Guide
    ...leaving DNA fragments with an overhang of 4 bp. If each DNA module is flanked with a standard overhang sequence...CRISPR vectors compatible with various delivery approaches, enzymes, and mechanisms. zCas9i cloning kit:...GATEway Cloning Kit Other, Zebrafish Expression Joachim Wittbrodt A toolkit that combines Golden Gate and...
  12. Gamma-Retroviral Vector Guide

    Type
    Guide
    ...lentiviruses also contain accessory genes specific to each virus type. From an experimental standpoint, the... 24464997 Maetzig, T., Galla, M., Baum, C., & Schambach, A. (2011). Gammaretroviral vectors: Biology, ...comprised of a U3-R-U5 structure and are found on each side of the provirus. The U3 (unique 3’) contains...
  13. Adenovirus Guide

    Type
    Guide
    ...into the host genome. Instead, they remain as extrachromosomal elements within the nucleus, normally as double-stranded...have been developed to reduce immune response and achieve longer transgene expression. Adenoviral Types Serotypes... Having the shape of a polyhedron with 20 faces, each being an equilateral triangle. Immunogenicity The...
  14. Addgene's eBook Collection

    Type
    Guide
    ...guide to viral vectors contains an introduction to each vector and its applications, tips for using vectors...
  15. Promoters

    Type
    Guide
    ...RNA polymerase in binding to the promoter region. Each sigma factor recognizes different core promoter ...
  16. AAV Production in HEK293 Cells

    Type
    Protocol
    ...-3 minutes for cells to detach. Gently tap the sides of the CS2 to help detach the cells, add 200 mL of...determine the total μg/bp we need to achieve a 1:1:1 molar ratio of each plasmid: 2000 μg / 24,961 bp = 0.08... minutes on ice between each pulse, 50% amplitude. Return to ice between each round of sonication to avoid...Pro-Tip While adherent, these cells are very loosely attached to the dish surface and should be handled carefully...magnesium, Corning 21-040-CV (cations can affect the attachment of adherent cells) 1 mg/mL Polyethylenimine (...the maintenance phase and do not allow cells to reach 100% confluence (80–90% is ideal). Pass and plate... flasks. Cells should be at ~80% confluence. For each T-175 flask: Aspirate culture media and rinse once...
  17. What is Polymerase Chain Reaction (PCR)

    Type
    Protocol
    ...master mix to add to each PCR tube. Secure the tops to the PCR tubes, gently tap each tube to bring all ...DMSO to each reaction. The ideal setup for this troubleshooting step is to do one reaction with each, and...stable within this temperature range to anneal to each of the single stranded DNA template strands. The...synthesized strands. Materials List Reagents for each 50µL PCR: Thin-walled PCR tube Ice Bucket 2 μL Template... 10X Taq buffer with MgCl 2 1 μl dNTP mix (10 mM each nt) 2.5 μL Forward Primer (10 μM stock) 2.5 μL Reverse...2 O 0.2 μL Taq DNA Polymerase (5 units/μL) PCR Machine Agarose Gel Procedure Primer Design and PCR Design...
  18. CRISPR Library Amplification

    Type
    Protocol
    ...conical tubes as needed. Add 10 mL cold LB to each plate for each scrape and use spreader to scrape plates..... Add each scrape into a 50 mL conical tube on ice pooling the scrapings of two plates into each tube....tube. Keep each tube on ice while scraping. Repeat addition of 10 mL cold LB and scrape for each plate until...adequate quality, but this upfront cost will save headaches and expense later. At a minimum we recommend the... tips in a -20 °C freezer. Aliquot 3 mL SOC into each of four 14 mL Vented Falcon Tubes and have 1 mL ...for all steps. Procedure Day 1 Add 200 ng DNA to each 50 µL aliquot of thawed Endura Duos on ice. Flick...vented Falcon Tube containing 3 mL SOC. Repeat for each of the 25 µl aliquots of cell/DNA mixture used (...
Showing: 81 - 100 of 958 results