Complete digestion of the peptide with pepsin followed by chromatography yielded a dipeptide containing Phe and Leu, plus a tripeptide containing Tyr and Gly in a 1:2 ratio.

• 用胃蛋白酶完全水解后经层析得到含Phe和Leu的二肽，还有一个Tyr:Gly为1:2的三肽。