Formulation: 250 mM Tris-base, pH 7.4, 1.37 M sodium chloride, containing 27 mM KCl, 0.4 mM phenol red, and 1.0% (v/v) polysorbate
Shelf life (days): 365
Notes: TBS-polysorbate stock solution (10X, pH 7.4) contains a concentrated solution of filtered TBS-polysorbate.