Defined Cell Culture Media 21 is a cell culture mixture consisting of: Arginine, Calcium Chloride, Calcium Pantothenate, Folic Acid, Glucose, Histidine, Inositol, Isoleucine, Leucine, Lysine, Magnesium Sulfate, Methionine, Niacinamide, Phenylalanine, Potassium Chloride, Pyridoxine, Riboflavin, Sodium Bicarbonate, Sodium Chloride, Sodium Phosphate, Thiamine HCl, Threonine, Tryptophan, Tyrosine, and Valine.