The amino acid lysine is shown below. What functional group must be removed in order to produce cadaverine (1,5-pentanediamine)
A. Lysine is 1, 5-pentanediamine. Nothing has to be removed.
B. One amino group must be removed and replaced with a hydrogen.
C. The carboxyl group must be removed and replaced with a hydrogen.
D. The hydrogen (shown) must be removed and replaced with an amino (NH2) group.
Answer: C
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