Lysyl-histidyl-phenylalanyl-arginyl-tryptophyl-glycinamide is an ACTH fragment; cyclic analog evoked excessive grooming behavior in rabbits when administered intracerebroventricularly.
Lysylcysteine is a dipeptide composed of lysine and cysteine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived