Defined Cell Culture Media 28 is a cell culture mixture consisting of: Alanine, Arginine HCl, Ascorbic Acid, Asparagine, Aspartic Acid, Biotin, Cysteine, Cysteine HCl, Glucose, Glutamic Acid, Glycine, Hexanediol, Histidine HCl, Hydroxyethylpiperazine Ethane Sulfonic Acid, Isoleucine, Leucine, Lysine HCl, Methionine, Niacinamide, Phenylalanine, Proline, Serine, sh-Oligopeptide-1, sh-Oligopeptide-2, sh-Polypeptide-1, Sodium Bicarbonate, Sodium Chloride, Threonine, Tryptophan, and Valine.