Which amino acid can be found in proteins in both its protonated and unprotonated forms?
A) alanine
B) glycine
C) histidine
D) phenylalanine

Name: Which amino acid can be found in proteins in both its protonated and unprotonated forms? A) alanine B) glycine C) histidine D) phenylalanine
Brand: Quizplus
Rating: 4.8 (32 reviews)

Question

Quizplus · Accepted Answer

Histidine has a side chain with a pKa close to neutral pH, meaning that it can exist in both protonated (positive charge) and unprotonated (neutral charge) forms within proteins.

Which Amino Acid Can Be Found in Proteins in Both