Hypersensitivity to a Synthetic Polypeptide: Induction of a Delayed Reaction

Abstract
A multichain copolypeptide, p (Tyr,Glu)-pAla-- p Lys, induced in guinea pigs a prolonged state of delayed hypersensitivity not associated with detectable circulating antibodies. Cross reactions of the delayed type were observed with chemically related polypeptides.