PBS 5X with Saponin

Phosphate buffered saline (1mM Na2HPO4, 137mM NaCl, 1.5mM KH2PO4, 2.7mM KCl) containing 5% Saponin, pH 7.4 +/- 0.2. Prepared in DI water and filtered using 0.22 micron filter. Shipped at RT, store at RT.