Which amino acid is ideal for the transfer of protons within the catalytic site of enzymes due to the presence of significant amounts of both the protonated and deprotonated forms of its side chain at biological pH?
A)Lysine.
B)Asparagine.
C)Tyrosine.
D)Cysteine.
E)Histidine.

Question

Quizplus · Accepted Answer

Histidine is the ideal amino acid for the transfer of protons within the catalytic site of enzymes, as it has a side chain that can exist in both protonated and deprotonated forms at biological pH, making it highly versatile for catalytic reactions.

Which Amino Acid Is Ideal for the Transfer of Protons