Which Amino Acid Is Ideal for the Transfer of Protons

question 94

Multiple Choice

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.

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