- Cyclic ADP-ribose as a second messenger revisited from a new aspect of signal transduction from receptors to ADP-ribosyl cyclase. Higashida, H., Hashii, M., Yokoyama, S., Hoshi, N., Chen, X.L., Egorova, A., Noda, M., Zhang, J.S. Pharmacol. Ther. (2001)