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  1. 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...
  2. 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...
  3. 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 (...
  4. Lentivirus ddPCR Titration

    Type
    Protocol
    ...aspirate, using a new aspirating pipette for each well. Detach cells by incubating with 200 µL TrypLE for 1...concentration of each sample on a spectrophotometer. Prepare 25 ng/µL stocks of each sample. Samples can...use. Wipe down all pipettes and surfaces with 10% bleach. Safety Warnings Lentivirus is generally considered...magnesium, Corning 21-040-CV (cations can affect the attachment of adherent cells) Trypsin EDTA (TrypLE, Thermo... of 80-fold dilution 200 µL 400 µL Add 150 µL of each viral dilution to a well of a 6-well plate (1 dilution...Mix the cell suspension well before seeding. Mix each well with a 1 mL pipette 5–10 times. The final volume...plates. Be sure to use a new aspirating pipette for each well as to not contaminate cell conditions with ...
  5. Isolating a Monoclonal Cell Population by Limiting Dilution

    Type
    Protocol
    ...the cells have detached from the plate and can be isolated. When trypsinized, detached cells will exhibit...magnesium, Corning 21-040-CV (cations can affect the attachment of adherent cells) Trypsin EDTA (TrypLE, Thermo...the transgene, and the specific conditions used. Each 96-well plate described in this protocol could, ...on the A549 cells described in our sample data , each 96-well plate gave rise to 15–20 monoclonal lines...cells this is about 2 × 10 6 cells in a 10 cm dish. Each 10 cm dish should be seeded in 10 mL DMEM complete...Prepare approximately 10 mL of this cell solution for each 96-well plate you plan to seed. If you choose not... Transfer 100 µL of the 5 cells/mL solution into each well of a 96-well plate. By doing this, you are ...
  6. Coomassie Purity Stain of Recombinant Antibodies

    Type
    Protocol
    ... µL of 4X sample buffer to each sample. Add 2 µL 10X reducing agent to each sample. Spin the sample briefly...peaks representing each protein band. Use the line tool to connect the bottom of each peak. Select the ...µL of 0.25 mg/mL with 10 µL PBS Transfer 5 µL of each standard to a microfuge tube. Add 8 µL of PBS to...gel. Carefully remove the comb from the gel. Rinse each well with 200 µL 1X MOPS running buffer. Fill the...skip one lane before loading samples. Load 20 µL of each recombinant antibody sample to the appropriate well...gel easier. Cover the electrophoresis chamber and attach to a power supply. Run the gel at 150 V for 1 h...Select Image . Select Type . Choose 8-bit . Determine each lane of the gel as follows: Figure 2 Using the box...
  7. Antibody Validation Using the Indirect ELISA Method

    Type
    Protocol
    ...the first three wells of each row, using a different standard solution for each row of a 96-well ELISA ...multichannel pipette to add 200 µL wash buffer to each well. Washing can be done by hand but if available...multichannel pipette, add 200 µL of blocking buffer to each well. Cover the plate with a plate seal and incubate...multichannel pipette, add 100 µL of secondary antibody to each well. Cover the plate with a plate seal and incubate...
  8. Virus Protocol - Generating Stable Cell Lines

    Type
    Protocol
    ...497 Add 0.5 mL of a single viral dilution to each well (each well gets one dilution, so a 6-well plate will...50,000 cells) into each well of the 6-well dish. This brings the total volume in each well up to 1.5 mL...expression observed using transient transfection approaches, generating cell lines using lentiviral vectors...magnesium, Corning 21-040-CV (cations can affect the attachment of adherent cells) 0.45 μm polyethersulfone filter...reverse transduction" by seeding 50,000 cells into each well of the 6-well dish. These cells will be added...polybrene, the final concentration of polybrene in each well should be 10 µg/mL. Pro-Tip Transducing too...antibiotic, which may not be stable at 37 °C. To achieve a stable cell pool, the antibiotic selection should...
  9. AAV Titration by qPCR Using SYBR Green Technology

    Type
    Protocol
    ... 96-well plate: Load 5 μL of each standard in duplicate Load 5 μL of each sample in duplicate. Do not ...well by pipetting back and forth multiple times at each step Reagent Preparation Master Mix: Count the number...that there is enough master mix for all samples). Each sample requires 15 μL of master mix. Pro-Tips Use...standard curve is obtained, make a small aliquot of each standard (enough for 1 or 2 plates) and store at...use within 1 week. Keep track of the Ct value for each standard over time. They should remain within 0.5...carrier DNA to a final concentration of 4 ug/mL to each standard dilution. Dilute DNase-treated and AAV ... dilution series is critical. Make sure to pipet each dilution up and down at least 10 times, and use ...
  10. Protocol - pLKO.1 – TRC Cloning Vector

    Type
    Protocol
    ...minutes at 95°C in a PCR machine or in a beaker of boiling water. If using a PCR machine, incubate the sample...recommends that you select multiple target sequences for each gene. Some sequences will be more effective than... for Inserts Day 1: 1. Inoculate 5 colonies from each ligation into LB + 100 μg/mL ampicillin or carbenicillin...different amounts of virus as needed. Day 1: a. For each plasmid to be transfected, plate 7×105 HEK-293T ... NOT use polystyrene tubes), make a cocktail for each transfection: 1 μg pLKO.1 shRNA plasmid 750 ng psPAX2...amount of Fugene® and OPTI-MEM necessary given that each reaction will require 6 μL FuGENE® + 74 μL OPTI-...temperature. e. Add 80 μL of FuGENE® master mix to each tube from step c for a total volume of 100 μL. Pipette...
  11. AAV ddPCR Titration

    Type
    Protocol
    ...use. Wipe down all pipettes and surfaces with 10% bleach. Safety Warnings AAV is generally considered biosafety...place on ice. Wipe down a DG8 cartridge holder with bleach and place in the Biological Safety Cabinet (BSC... a single channel 1–10 µL pipette to add 5 µL of each viral sample to Dilution 1 in the 48-well dilution...avoid generating aerosols. Be sure to change tips each time. Dilution 1 (20X): 5 µL in 95 µL 1X PCR buffer...well freezer block. Add 20 µL of the master mix to each PCR tube. Be careful to dispense to the bottom of...to get to temperature. Once the temperature is reached, place the PCR plate with the foil onto the metal...the following equation to calculate the titer for each sample: $$T = {R*C*D*1000\over V}$$ Where: T = Titer...
  12. Affinity Purification of Recombinant Antibodies with Protein A or Protein G

    Type
    Protocol
    ...Starting Wipe down all pipettes and equipment with 10% bleach prior to use. Warm the affinity column, binding...gently pour off the ethanol storage buffer. Tightly attach LabMate PD10 Buffer Reservoirs to the top of the...columns, refer to the manufacturer’s instructions. Attach the Gravitrap column to a clamp on a clamp stand...s to mix. Determine the protein concentration of each fraction on the NanoDrop Spectrophotometer using... 3x , discarding buffer from the collection tube each time. Place column in a new 50 mL LoBind collection...NanoDrop Spectrophotometer to see if the sample has reached the desired concentration. If the sample concentration...until the volume of the sample is reduced enough to reach the desired concentration. Pro-Tip Periodically ...
  13. Pipetting Protocol

    Type
    Protocol
    ... Although each pipette performs the same function, the numbers are read differently on each type of pipette...to 100 µL P200 20 to 200 µL P1000 100 to 1,000 µL Each pipette should be used with the appropriate tips...This section will help you understand how to read each display to dispense the correct amount of liquid... picture above), while 0.5 µL would read as 050. Each volume display on these pipettes will also have ...to expel excess liquid from the tip once you’ve reached step 8. Continuing to hold down the plunger, gently...liquid so that it's easier for the pipette tip to reach the liquid. Aim to let only the pipette tip into...
  14. AAV Purification by Iodixanol Gradient Ultracentrifugation

    Type
    Protocol
    ...Repeat for each QuickSeal tube. (Optional) For first time users, it is a good idea to assay each fraction...of 60% iodixanol and 45 μL of phenol red Underlay each solution into a QuickSeal tube in the order below...mL fractions in microcentrifuge tubes. Repeat for each QuickSeal tube. The first 3 mL collected corresponds...below the 60–40% interface with an 18 ga needle attached to a 10 mL syringe. The bevel of the needle should...note that iodixanol is not easily removed. After each spin, add more formulation buffer and sample and...stain. Note the increased number of contaminants in each fraction. * AAV capsid proteins VP1, VP2, VP3; M...
  15. Fluorescence Titering Assay

    Type
    Protocol
    ...the cells. Add 1.5 mL of a viral dilution to each well (each well gets one dilution with one well remaining...magnesium, Corning 21-040-CV (cations can affect the attachment of adherent cells) 0.45 μm polyethersulfone filter...freeze-thaw cycles. Procedure Seed 75,000 cells into each well of a 6-well dish. Prepare a batch of cells ... inverting. Aliquot 2 mL of cell suspension into each well of the 6-well dish. Incubate the cells overnight...Calculate the fraction of fluorescent-positive cells in each well. When calculating titer, only consider wells...
  16. Colony Formation Titering Assay

    Type
    Protocol
    ...quantified. Add 150 μL of a viral dilution to each well (each well gets one dilution) Also include an untransduced...magnesium, Corning 21-040-CV (cations can affect the attachment of adherent cells) 0.1% Crystal Violet, Ward’...of media in place of virus. Seed 1,000 cells into each well of a 6-well dish. Prepare a batch of cells ...inverting. Aliquot 1.35 mL of the cell suspension into each well of the 6-well dish directly on top of the virus...0.22 μm filter to remove any precipitates. Stain each well with 1 mL of 0.1% crystal violet for 10 min...
  17. Protocol - How to Purify DNA from an Agarose Gel

    Type
    Protocol
    ... from each other, and a lower percentage gel will help separate larger bands. 10% Rule For each sample...possible. You will want nice crisp bands. This can be achieved by using a wider gel comb and running the gel ...voltage. You will want to have enough space around each band to cut without having DNA in other lanes contaminating...volume and this is used to determine how much of each buffer to add during the DNA isolation step. Finally...
  18. Plasmid Modification by Annealed Oligo Cloning (with Protocols)

    Type
    Protocol
    ... sites of the vector, we design a top oligo with each of the additional sites in tandem ( NdeI - CATATG... the bottom oligo, making our final oligos 34 bp each: Top oligo: 5' - AATTC CATATG TTAATTAA GGCGCGCC ... CAGCT - 5' Note: We could leave off the 3’ G on each oligo (and the complementary C of the other oligo...equimolar concentrations. We recommend mixing 2μg each in a total volume of 50μL - add additional annealing...necessary to get to 50μL. Efficient annealing can be achieved by one of two methods: Method #1 Place the mixed...
  19. Lab Safety for Biosafety Levels One and Two

    Type
    Protocol
    ...hazards and to provide protective measures for each level, as each level has different safety requirements. ...you may use 70% ethanol, quaternary ammonium, or bleach solutions. Ask your lab supervisor what is available...available and the appropriate contact times for each agent. Make sure you have enough space to work at your... decontaminated in a final concentration of 10% bleach for 30 minutes before pouring down the drain. Solid...
  20. Protocol - How to Ligate Plasmid DNA

    Type
    Protocol
    .... After ligation, the insert DNA is physically attached to the backbone and the complete plasmid can be... are what allow the vector and insert to bind to each other. When the sticky ends are compatible, meaning...on either side of the vector are compatible with each other, the vector is much more likely to ligate ... the ligation will vary depending on the size of each and their concentration. However, for most standard...you want, and it will tell you exactly how much of each to use. Reference Page Top Index...
Showing: 1 - 20 of 44 results