Calcium phosphate transfection is one of the most commonly used methods to deliver plasmid DNA into mammalian cells. Due to its highly consistent pH and salt concentration, our CalPhos calcium phosphate transfection kit gives you the consistent transfection efficiency that you cannot always achieve with home brew versions. For this reason the CalPhos Mammalian Transfection Kit has remained one of the most popular commercially available calcium phosphate transfection kits for nearly two decades.