...vector transfected into 293T cells using a polyethylenimine (PEI) transfection protocol. This procedure... Thermo Fisher, 12309019 25 mM chloroquine Polyethylenimine, linear MW 25,000 Da Heat-inactivated FBS ... the attachment of adherent cells) 0.45 μm polyethersulfone filter, Nalgene, 565-0010 Microcentrifuge ...Hydrochloric acid Sodium hydroxide 0.22 μm polyethersulfone (PES) filter Transfection grade DNAs: Lentiviral...lab by heating to 56°C for 30 min. 1 mg/mL polyethylenimine, linear MW 25,000 Da (PEI) Dissolve 100 mg...harvests, transfer the harvested media to a polypropylene storage tube and store at 4 °C between harvest...