...polyethersulfone filter, Nalgene, 565-0010 (for viral preps, if prep was not previously filtered) Microcentrifuge...15 mL conical tubes, VWR 21008-216 Lentivirus preparation Appropriate antibiotic for selection (e.g. puromycin...puromycin, blasticidin) Reagent Preparation DMEM Complete: 10% v/v FBS and 4 mM L-alanyl-L-glutamine (...determine the lowest dose that kills all of the cells. Prepare a batch of DMEM complete + 10 µg/mL polybrene by...Thaw the lentiviral aliquot on ice prior to use. Prepare a range of dilutions of the lentivirus in DMEM ...cell solution in this step. To seed the cells: Prepare a batch of cells as follows: Dilute 350,000 cells...growing well and have been sufficiently expanded, prepare cell stocks and/or harvest to test for protein ...