Look at this undecapeptide: Arg Asp Cys Glu Leu Lys MetPhe NH4+. What would each step do to the udecapeptide?Draw the final structure.
a. treatement with iodoacetate that had noaffect on the undecapeptide.
b. treatment with 2 x 2-mercaptoethanolyielding a tripe-tide and octapeptide.
c. treatment with carboxypeptidase A liberatedleucine.
d. treatment with cyanogen bromide yielding amethionine, a tripeptide and a heptapeptide.
The question states that these amino acids are only somecomponents of the undecapeptide structure and that some amino acidswithin this structure may be repeated. The point is to determinethe correct structure following several treatments. After thesetreatments, what conclusions can you make about the structure ofthe undecapeptide? What might the structure be?
