Practice question
Question
Protein kinases phosphorylate proteins at hydroxyl groups on amino acid side chains. Which one of the following groups of amino acids contain side chain hydroxyl groups?
Explanation
In biochemistry, enzyme catalysis and lipid structure dictates that substrate affinity, transition state stabilization and phospholipid composition govern function. Therefore Serine, threonine and tyrosine is correct as it reflects catalytic efficiency and membrane organization, supported by mechanistic studies and conserved across related systems.
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