So I need to store these for 4 weeks at least, before I do a Dyna bead negative T cell isolation on it. What should I store it in FBS? or DMSO and at 4 degrees? or is -20 not good for the cells?
Isolated cells > wash with DPBS > resuspend in freezing solution (90% FBS + 10% DMSO, sterile) > store at -80 oC. For the best recovery store freeze with Mr. Frosty or dedicated freezing boxes to avoid sharp decrease in temp. Storing at 4 oC with DMSO will definitely kill all the cells.