NaOH, H+, heat NaOCH 16 C. Valine 17. Which compound is Trp-Phe CO2H H2N HO2C NH
ID: 1020210 • Letter: N
Question
NaOH, H+, heat NaOCH 16 C. Valine 17. Which compound is Trp-Phe CO2H H2N HO2C NH H2N a. H CO2H HO NH H e.. not a.-d 18. Ignoring stereochemistry, which protected alpha-amino acid reacts with another blocked alpha-amino acid, DCC and is de-protected to make compound 17.a.? NH HaN OH OCHs OH e. not a.-d 19. How many dipeptides would be formed from the reaction of 3 different amino acids with DCC? e. not a.-d 20. What is the structure of the phenylthiohydantoin product of the Edman degradation of proteins? Ph phenyl Ph Ph Ph e. not a -d PhExplanation / Answer
17. b and c are Trp-Phe
so answer is e. not a, d
18. option c. is correct
19. d. 3x3=9 is correct
20. option b. is correct
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