Alfa -melanotropin: the minimal active sequence in the lizard skin bioassay - Castrucci, Ana Maria de Lauro; Hadley, M E; Sawyer, T K; Wilkes, B C; Al-Obeidi, F; Staples, D J; Vaux, A E; Dym, O; Hintz, M F; Riehm, J P; Rao, K R (General and Comparative Endocrinology, 1989)