Question

This is the amino acid cysteine. Circle the amine group, put a box around
the carboxylic acid group and use a different colored pencil/pen to circle the side
chain (R group).


H O
| ||
NH2— C- C-OH
|
CH2
|
SH​

Answer 1

I attached the pic. NH2 is amine group, COOH is carboxyl group.