Biochemistry 6th Edition by Reginald Garrett,Charles Grisham

Exercise 5

Solving the sequence of an oligopeptide from sequence analysis data
Amino acid analysis of an octapeptide revealed the following composition:
The following facts were observed:
a. Edman degradation gave

b. CNBr treatment yielded a pentapeptide and a tripeptide containing phenylalanine.
c. Chymotrypsin treatment yielded a tetrapeptide containing a C-terminal indole amino acid and two dipeptides.
d. Trypsin treatment yielded a tetrapeptide, a dipeptide, and free Lys and Phe.
e. Clostripain yielded a pentapeptide, a dipeptide, and free Phe.
What is the amino acid sequence of this octapeptide?