13. Strictly defined, Pro is not an -amino acid. Which group takes the place of the free amino group that is found in the other 19 amino acids?
















.
Incorrect

Read question #13 again?

Comment: Pro is an imino   acid; the secondary amine group attached to the -carbon also bonds to the side-chain to make a five-membered ring.
In proteins, proline interrupts regular secondary structures such as -helices and -structures.

Read question #13 again?

Accessibility statement