- Functional characterization of structural alterations in the sequence of the vasodilatory peptide maxadilan yields a pituitary adenylate cyclase-activating peptide type 1 receptor-specific antagonist. Moro, O., Wakita, K., Ohnuma, M., Denda, S., Lerner, E.A., Tajima, M. J. Biol. Chem. (1999)