system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 48-year-old man comes to the emergency department because of a 1-hour history of heavy nasal bleeding. He drinks half a bottle of sherry daily. His pulse is 112/min, and blood pressure is 92/54 mm Hg. Physical examination shows scattered ecchymoses across the extremities and oozing from a venipuncture site. Laboratory studies show a prothrombin time of 28 seconds and a partial thromboplastin time of 36 seconds. Impaired function of which of the following proteins is the most likely cause of this patient's hemorrhage?
assistant
Gamma-glutamyl carboxylase