In this study, angiotensin-I converting enzyme (ACE) inhibitory tripeptides from rice protein hydrolysate were purified and their properties were further characterized. Val-Asn-Pro (VNP) and Val-Trp-Pro (VWP) were successfully purified from rice protein hydrolysate through multi-step isolation and purification comprising of ultrafiltration and DA201-C macroporous adsorption resin, followed by a two-step reverse phase high performance liquid chromatography (RP-HPLC). The sequences of tripeptides were separately assayed by using automated protein/peptide sequencer. In addition, the stability of ...