Organic Chemistry (3 questions)

1. Match a structure from the list below to each of the following terms.
Place the letter of the structure in the blank to the left of the term
in which it describes.



_________ an octapeptide with a C-terminal valine.

_________ an amino acid in its zwitterionic form.

_________ a polypeptide which gives four fragments on treatment with
chymotrypsin.

_________ a carboxyl-protected amino acid.

_________ a peptide coupling reagent.

_________ small organic molecules which act as coenzymes.

Give the major organic product(s) of the following reaction (see page
2).



O

HO

L. Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M. Vitamins

O

N

O

K.

CH3

S

O

Ph

N

N

J.

CH3

O

O

I. (CH3)3COCNHCHCOH

N

N

C

H.

F. Asp-Tyr-Ile-His-Pro-Phe-Arg-Val G. Apoenzyme

O

NH2

E. CH3CHCOH

NH2

O

D. (CH3)2CHCHCOCH2Ph

C. Val-Phe-Leu-Met-Tyr-Pro-Gly-Trp-Cys-Glu

+NH3

O

_

B. CH3CHCO

O

A. [(CH3)3COC]2O

SnCl4, Benzene

O

Cl – C – Ph

S

3.

2.

NH3

KNH2

Cl

N