Protein X is activated by protein kinase A. A mutation in protein X that replaces the protein's only serine residue with an arginine residue would be expected to

Question

Quizplus · Accepted Answer

Protein kinase A phosphorylates serine residues to activate protein X, so if the only serine residue is replaced with an arginine residue, protein kinase A will no longer be able to phosphorylate and activate the protein. Therefore, the mutation would eliminate activation of protein X.

Protein X Is Activated by Protein Kinase A