...ensure that you are in compliance with your institution’s biosafety regulations. Last Update: February...Leupeptin, Millipore Sigma L2884 Aprotinin saline solution, Millipore Sigma A6279 Before Starting Warm the...µm filter. Prepare 10 mL aliquots and store the solution at -20 °C. 1 mg/mL PEI-MAX Add 1 g of PEI-MAX ...but check for the presence of particles still in solution. Continue to stir until all particles have dissolved... to ensure that it has not drifted. Filter the solution through a 0.22 µm filter. Prepare aliquots and...at 4 °C until use. We suggest preparing fresh solutions after one month. BCD Feed 500 mL BalanCD HEK293...at 4 °C until use. We suggest preparing fresh solutions after one month. 1000X protease inhibitor cocktail...