Phosphate-Buffered Saline (PBS) is a physiological buffered salt solution.Applications: Used in cell culture; such as washing cells prior to dissociation, transporting tissue and cell samples, diluting cells for counting. Used in protein chemistry, such as protein microarray hybridization and washing, Western-Blot, diluting protein samples. Used in preparing reagents. Our PBS formulation does not contain calcium and magnesium, divalent ions that stimulate cell aggregation.