Phosphate Buffer Saline, PBST (20X with 2% Tween 20, pH 7.4)

20X PBS with 2% Tween-20. pH 7.4 ± 0.2. The pH of the 1X should be pH 7.4 ± 0.2. To make 1X, dilute 20-fold with deionized water. Shipped at room temperature. Store at room temperature.