DPBS (Dulbecco’s Phosphate-Buffered Saline) is a balanced salt solution commonly used in cell culture to wash cells, dilute reagents, or resuspend cell pellets. It contains essential salts, such as sodium chloride, potassium chloride, and phosphate, to maintain the pH and osmolarity of the solution. DPBS is typically used when cells need to be kept in an isotonic environment without disrupting their physiological conditions.