title: Inhibitory and facilitatory effect of two related peptides on extinction of avoidance behavior.
abstract: The polypeptide chain which constitutes the first ten amino acids of the ACTH molecule inhibits extinction of a shuttle-box avoidance response. If the phenylalanine molecule in the 7th position of this peptide is replaced by its dextrorotatory form, extinction is facilitated.
authors.forename: B
authors.initials: B
authors.lastname: Bohus
authors.forename: D
authors.initials: D
authors.lastname: De Wied