Melanocyte Medium-PMA free (MelM-2), when used with Melanocyte Growth SupplementPMA-free (MelGS-2, Cat. no. 2262) and 2.5 ml of fetal bovine serum (FBS) is a complete medium designed for optimal growth of normal melanocytes in vitro. It is a sterile, liquid medium which contains essential and non-essential amino acids, vitamins, organic and inorganic compounds, hormones, growth factors, trace minerals and a low concentration of FBS (0.5%). The medium is HEPES and bicarbonate buffered and has a pH of 7.4 when equilibrated in an incubator with an atmosphere of 5% CO2/95% air. The medium is formulated (quantitatively and qualitatively) to provide an optimally balanced nutritional environment that selectively supports the growth of normal melanocytes in vitro.