<jats:title>Abstract</jats:title> <jats:p>Three peptides were isolated from both Trimeresurus flavoviridis (Habu snake) and T. okinavensis (Himehabu snake) venoms. Their structures were determined to be pGlu–Lys–Trp, pGlu–Asn–Trp, and pGlu–Gln–Trp. Only pGlu–Lys–Trp showed weak inhibitory activities against angiotensin converting enzyme and H2-protease.