biochemical studies centering on the use of reverse-phase high-performance liquid chromatography ( hplc ) and radioimmunoassays ( ria ) demonstrate the presence in the guinea pig organ of corti of at least 3 enkephalin-related peptides , two of which are identified as met- and leu-enkephalin , respectively .
C0014298
enkephalin
C0014294
leu-enkephalin