10XPBS with 0.5%v/v Tween 20 (10X PBST)Phosphate Buffered Saline with Tween 20. (PBST)This is a 10X PBS with 0.5%v/v Tween 20 concentrate which is diluted to working strength giving a 1X PBS with 0.05%v/v Tween 20 solution pH7.4 (1XPBST) . Used in ELISA plate washing and other molecular biologyImmunology buffer washing techniques. Supplied Autoclaved sterile and 0.2 micron filtered.Dilute the 10X PBST to working strength with sterile ddH2O.