Studies of Bitter Peptides from Casein Hydrolyzate. II. Syntheses of Bitter Peptide Fragments and Analogs of BPIa (Arg–Gly–Pro–Pro–Phe–Ile–Val) from Casein Hydrolyzate
Studies of Bitter Peptides from Casein Hydrolyzate. II. Syntheses of Bitter Peptide Fragments and Analogs of BPIa (Arg–Gly–Pro–Pro–Phe–Ile–Val) from Casein Hydrolyzate
In order to investigate the relationship between bitterness and chemical structure of BPIa, eleven kinds of fragments and analogs of BPIa were synthesized. des–Gly2–BPIa and des-Pro4-BPIa exhibited extremely bitter taste. However, the pentapeptide (Arg–Gly–Pro–Pro–Phe) of BPIa possessed weak bitterness. The bitterness exhibition of BPIa probably derived from the spatial structure of its molecule.