PACAP (1-38), a novel neuropeptide isolated from the bovine hypothalamus is more active than vasoactive intestinal peptide (VIP) in stimulating adenylate cyclase (EC50=7 nM). PACAP 1-38 (10-9 M) increased substance P (SP), gastrin releasing peptide (GRP), and VIP release. PACAP 1-38 (10-8 M) inhibited gastrin secretion and stimulated somatostatin secretion and motility dose-dependently.

4'-Hydroxychalcone is a chalcone metabolite with hepatoprotective activity.

AKTide-2T is an excellent in vitro substrate for AKT and shows competitive inhibition of histone H2B phosphorylation with a Ki of 12 nM. AKTide-2T mimics the optimal phosphorylation sequence of Akt and is an inhibitory peptide with the wildtype AKTide lacking Thr in the S22 position.