2.          Solving the sequence of an oligopeptide from sequence analysis data. Amino acid analysis of

a short oligonucleotide fragment indicated the presence of the following amino acids:

Asp      Ala       Cys       Trp       Met      Ile         Lys       His       Phe      Tyr       Glu

a.          The phenylthiohydantoin derivative that was released from Edman degradation is:

The picture is attached! 

b.          Trypsin treatment yielded two products: a tetrapeptide and a hexapeptide.

c.           Staphylococcal protease treatment yielded three oligopeptides (a tripeptide, a

pentapeptide, and another tripeptide.

d.          Cyanogen bromide treatment produced two products; a pentapeptide and a hexapeptide.

e.          Clostripain treatment did not yield any results. What is the amino acid sequence of this oligopeptide?