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  1. Protocol - pLKO.1 – TRC Cloning Vector

    Type
    Protocol
    ...drives RNA Polymerase III transcription for generation of shRNA transcripts. cPPT Central polypurine tract...HIV-derivative viruses. For transient knockdown of protein expression, you may transfect plasmid DNA directly...Day 2: b. Perform the transfection in the late afternoon because the transfection mix should only be incubated...it, and does not grant any license, express or implied, under any patent. All transfers of materials from...protocol is provided for your convenience. See “warranty information” in appendix. Table of Contents A....Digesting pLKO.1 TRC-Cloning Vector C.4 Ligating and transforming into bacteria D. Screening for Inserts D.1 Recommended...Sequence of pLKO.1 TRC-Cloning Vector I.2 Recipes I.3 Warranty information Back to Top A. pLKO.1-TRC Cloning ...
  2. Lentivirus Production

    Type
    Protocol
    ...Different brands and lots of FBS can promote or inhibit transfection. Test a variety of brands and lots...lentiviral vector transfected into 293T cells using a polyethylenimine (PEI) transfection protocol. This ...packaging cells Day 1 (pm): Transfect packaging cells Day 2 (am): 18 h post-transfection. Remove media, replace... optimized for each transfer plasmid. Pro-Tip Endotoxins can inhibit transfection; therefore, plasmid ...modified for alternative packaging cell lines or transfection reagents. Once produced, lentivirus can be used...hydroxide 0.22 μm polyethersulfone (PES) filter Transfection grade DNAs Reagent Preparation DMEM Complete...drifted. Filter the solution through a 0.22 μm membrane. Aliquot 500–1000 μL into sterile tubes. Store...
  3. Colony Formation Titering Assay

    Type
    Protocol
    ...Different brands and lots of FBS can promote or inhibit transfection. Test a variety of brands and lots...time as the virus-mediated transduction. For some cell lines, transduction is optimized if the cells are...When the untransduced (negative control) cells have died and colonies are visible in the transduced wells...experiments. Workflow Timeline Day 0: Seed and transduce cells Day 2: Replace media with fresh media containing...to the media, as it can affect viability and transduction efficiency. Titer will vary between cell lines... are seeded the day before transduction. Note that in that case, polybrene should only be added at the...the time of viral transduction, and not during the cell seeding step. Procedure Before beginning a colony...
  4. Isolating a Monoclonal Cell Population by Limiting Dilution

    Type
    Protocol
    ... volume of homogenized cell solution is transferred. Transfer cells from the homogenized cell solution...990 µL complete medium. Instead of transferring 0.125 µL, now transfer 100 times that volume, which is 12.5... solution, transfer 12.5 µL of the 1:100 dilution to 10 mL of conditioned medium. Transfer 100 µL of the...generated from A549 cells transduced with lentiCas9-Blast 1 . A549 cells were transduced (MOI = 37) and selected...line from a polyclonal pool of stable cells. Transducing cells with lentivirus results in a heterogenous...heterogeneous cell pool could lead to reduced transgene expression over time, as the lower expressing ...populations that are more likely to retain stable transgene expression. Other methods of generating a monoclonal...
  5. AAV Production in HEK293 Cells

    Type
    Protocol
    ...Different brands and lots of FBS can promote or inhibit transfection. Test a variety of brands and lots...cells in CS2 Day 2: Seed cells in CS5 Day 3 (am): Transfect cells Day 7 (am): Harvest cells Equipment Class...Polyethylenimine (PEI) 25 kDa MW Pro-Tip Other transfection reagents may be used in this protocol, but their...their conditions must be optimized. Plasmids for transfection: pHelper; pRC (Rep-Cap), plasmid expressing ...drifted. Filter the solution through a 0.22 μm membrane. Aliquot 500–1000 μL into sterile tubes. Store... pH to ~8.5 Filter sterilize through a 0.22 μm membrane. Store at 4 °C. Considerations Before You Start... Pass and plate the cells the day before the transfection. Thaw a new vial of cells after 30 passages....
  6. Fluorescence Titering Assay

    Type
    Protocol
    ...Different brands and lots of FBS can promote or inhibit transfection. Test a variety of brands and lots... were transduced with a range of dilutions of pHAGE-TO-dCas9-3XmCherry . 72 h post transduction, cells...cells transduced F = Fraction of cells with fluorescence D = Dilution Factor V T = Transduction Volume...Workflow Timeline Day 0: Seed 293T cells Day 1: Transduce cells Day 2 (am): Remove media, replace with fresh...to the media, as it can affect viability and transduction efficiency. Titer will vary between cell lines...1468.5 1.5 1:75 20 1478.5 1.5 1:100 15 1483.5 1.5 Untransduced 0 1498.5 1.5 Mix the dilutions well Gently aspirate... one dilution with one well remaining as the untransduced control). Count the cells in the remaining well...
  7. Lentivirus ddPCR Titration

    Type
    Protocol
    ... is based on an LV titer range of 1E+05–1E+09 TU/mL, where TU is transducing units and generally represents...July 7, 2023 Workflow Timeline Day 1: Seed and transduce cells Day 4: Treat cells with Benzonase and harvest...Complete 3 µL of 250 U/µL benzonase Procedure Transducing Cells Thaw the virus on ice. Prepare the following... pipette 10–20 times. Use a new pipette tip to transfer 200 µL of the first dilution into the next dilution... plate (1 dilution per well). Leave one well untransduced (add 150 µL of DMEM complete instead of a viral... into the wells containing the virus and the untransduced control. Pro-Tip For even seeding, prepare a...min. Resuspend cells in 500 µL DMEM complete and transfer to a microcentrifuge tube. Centrifuge for 5 min...
  8. What is Polymerase Chain Reaction (PCR)

    Type
    Protocol
    ...step heats the double stranded DNA template strand to the point where the strands start denaturing and ...this temperature range to anneal to each of the single stranded DNA template strands. The DNA polymerase...of the sense and anti-sense strands of the template DNA. They are strands of nucleic acid that are starting...molar ratio. It also requires two unique single stranded DNA oligonucleotide (oligo) primers, which anneal...seconds at 94°C: Continued denaturation of double stranded DNA. Anneal primers for 30 seconds at 55°C: The...polymerase to synthesize and elongate the new target DNA strand accurately and rapidly. Repeat steps 2-4 25-30 ...fill-in any protruding ends of the newly synthesized strands. Materials List Reagents for each 50µL PCR: Thin-walled...
  9. CRISPR Library Amplification

    Type
    Protocol
    ... Day 1: Transform, recover, set up overnight growth (Estimated time 2-3 hours) Transformation should be...of 5 mL (3 mL SOC + 2 mL transformed Endura from two separate transformations). Pro-Tip Do not pipette...assumes familiarity with standard bacterial transformation and basic knowledge of the library being amplified...amplified. Please see our protocol on Bacterial Transformation . The generalized pooled library amplification...premixed LB (VWR 101414-072) for convenience but any brand or house- made LB that supports normal growth is...using a new vented falcon tube for every two transformations. Each of the four 14 mL Vented Falcon Tubes...repeatedly or mix when removing SOC containing transformed DNA-Endura from cuvette. Shake four 14 mL Vented...
  10. Protocol - Over-Agar Antibiotic Plating

    Type
    Protocol
    ...incubation, transform DH5α E. coli cells by heatshock with the plasmid of interest. See our transformation page...for a detailed heatshock transformation protocol. Plate 50 µL of transformed E. coli /rescue media suspension...also like... Making LB Agar Plates Bacterial Transformation Recovering Plasmid DNA from Bacterial Culture...plating antibiotic over-agar for the selection of transformed E. coli . Over-agar spreading of antibiotic makes...investigator to conveniently plate and select transformed cells containing plasmids differing in their ... sterile water (or other antibiotic) E. coli transformed with a plasmid containing the carbenicillin (...carbenicillin, plated over-agar for selection of transformed E. coli . Sample Data Selection of E.coli on ...
  11. Plasmid Cloning by PCR (with Protocols)

    Type
    Protocol
    ...recipient plasmid backbone. Transformation Proceed with the transformation according to the manufacturer...from your transformation will give you the first indication as to whether your transformation worked. Your...Digest of Plasmid DNA DNA Ligation Bacterial Transformation Summary PCR based cloning is incredibly versatile...chance for mis-priming, so you can use a pretty wide range of annealing temperatures, but you may need to increase...competent cells. For most standard cloning, you can transform 1-2μl of your ligation reaction into competent...conduct a positive control to ensure that your transformation worked. You could also try varying the amount...cloning. DNA replication by PCR has error rates that range from roughly 1 per 500bp to roughly 1 per 10 million...
Showing: 921 - 940 of 986 results