PLE-1329

A 44-year-old alcoholic was brought to the emergency department by his friends. During their usual gathering at the local bar, he passed out, and his friends were unable to revive him. The physician ordered an injection of Thiamine, followed by overnight parenteral glucose. The next morning, the patient was alert and coherent, serum thiamine was normal, and blood glucose was 73 mg/dl (4mM). The patient was then sent home. At the time of discharge from the hospital, which of the following proteins would have no significant physiological activity in this patient?