User:Behzad Damadzadeh/Notebook/PcTF Subcloning in E-coli/2013/08/02: Difference between revisions
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= | =08/02/2013= | ||
''' | ==Procedure== | ||
# | # '''Pre-warm the growth medium and 100% FBS (NOT the frozen vial of cells) to 37°C in the bead bath'''. | ||
# After reagents are warmed, spray bottles down with 70% ethanol and prepare the biosafety hood as for routine work. Do all work in the biosafety hood. | |||
# Transfer 5 mL of 100% FBS into a 15 mL conical tube (one per frozen cell vial). | |||
# Retrieve the frozen cell vial from the -150°C freezer. | |||
# Quick-thaw the frozen vial in the 37°C bead bath just until the last of the ice in the tube is thawed. Do this for no more than 2 minutes. '''It took 4 minutes to thaw''' | |||
# Use a 5 mL pipette to transfer the 1 mL of thawed cells into the 5 mL of FBS. Do '''not''' mix by pipetting. | |||
# Spin the cells + FBS at room temperature at 1000 rpm for 3 minutes. If you have just one tube, use a counter balance of equal volume (6 mL water). | |||
# Get a new '''T-25 flask''' and label it with the label it with the cell line name, your initials, the date, "thawed" to indicate that this is a new culture. | |||
# After the cells have pelleted, bring them back to the biosafety cabinet and aspirate off the FBS, but leave about 100 uL of FBS covering the pellet. | |||
# Flick the tube to gently resupend the pellet in the ~100 uL FBS. | |||
# Stand the t-25 flask up and remove the cap. | |||
# Add 4 mL of growth medium to the cells. Mix by gently pipetting up and down (about 3 times). | |||
# Transfer the cells + medium into the T-25 flask. | |||
# Lay the flask flat and push it back-and-forth and side-to-side to spread the cells evenly. Do not swirl it in a circular motion. | |||
# Place the flask into the 37°C incubator. The cells should adhere to the growth surface overnight. | |||
# Discard all plastics, etc. that have come into contact with growth medium and cells as biohazard waste. | |||
Follow-up expansion: After the cells have become 100% confluent in the T-25 flask, aspirate off the growth medium, wash the cells with 2 mL 1xPBS, trypsinize them with 0.5 mL of Trypsin buffer and transfer the entire culture into a T-75 flask with 10 mL total growth medium (10% FBS, 1% pen-strep). After the t-75 is 100% confluent, you can make new frozen stocks or passage the cells at 1:10 (or 1:5 if they are slow-growing). |
Revision as of 17:15, 2 August 2013
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08/02/2013Procedure
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