All but one of the common amino acids contain a -NH₂ amino group.Which one contains an -NH- amino group as part of a ring structure?

Question

Quizplus · Accepted Answer

Proline is unique among the standard amino acids because its amino group is part of a ring structure, making it an imino acid rather than a true amino acid. This ring structure involves the -NH- group being part of the ring, distinguishing it from the typical -NH2 amino group found in other amino acids.

All but One of the Common Amino Acids Contain a -NH2

All but One of the Common Amino Acids Contain a -NH₂