A 27 year old woman is evaluated for diffuse hair loss and a scaly dermatitis around the eyes, nose, and mouth. She recently completed a prolonged course of broad spectrum antibiotics after complicated appendicitis and has also been drinking several raw egg white protein shakes daily. Which of the following enzyme classes is most likely impaired in this patient?
- A)Oxidative decarboxylases
- B)CarboxylasesGABARITO
- C)Hydroxylases
- D)Transaminases
- E)Transferases using tetrahydrofolate
Explicação
Raw egg whites contain avidin, which binds biotin, and prolonged antibiotic use decreases gut flora that contribute to biotin availability. Biotin is a cofactor for carboxylase enzymes such as pyruvate carboxylase, acetyl CoA carboxylase, and propionyl CoA car... Ver explicação completa e trilha adaptativa →