A convenient set of selected individual HDAC (Histone Deacetylase) inhibitors containing the following six: 1 mg of Apicidin (Cat. No. 1601-1), 1 mg of M344 (Cat. No. 1607-1), 100 mg of Sodium 4-phenylbutyrate (Cat. No. 1608-100), 5 mg of Splitomycin (Cat. No. 1610-5), 1 mg of Trichostatin A (Cat. No. 1606-1), and 200 mg of Valproic Acid, Sodium Salt (Cat. No. 1647-200).