Which of the following correctly describes the mechanism of pyruvate carboxylase?
A) ATP and bicarbonate react, carboxyphosphate formed, carboxyl group transferred to biotin, deprotonated pyruvate attacks carboxyl group
B) ATP and bicarbonate react, carboxyl group transferred to biotin carboxyphosphate formed, deprotonated pyruvate attacks carboxyl group
C) ATP and bicarbonate react, carboxyphosphate formed, deprotonated pyruvate attacks carboxyl group, carboxyl group transferred to biotin
D) carboxyphosphate formed, ATP and bicarbonate react, carboxyl group transferred to biotin, deprotonated pyruvate attacks carboxyl group
E) carboxyphosphate formed, deprotonated pyruvate attacks carboxyl group, ATP and bicarbonate react, carboxyl group transferred to biotin
Correct Answer:
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