- The design of a new potent and selective ligand for the orphan bombesin receptor subtype 3 (BRS3). Boyle, R.G., Humphries, J., Mitchell, T., Showell, G.A., Apaya, R., Iijima, H., Shimada, H., Arai, T., Ueno, H., Usui, Y., Sakaki, T., Wada, E., Wada, K. J. Pept. Sci. (2005)