The Equilibrium Constant for Most of the Transaminases Is About

The equilibrium constant for most of the transaminases is about 1.0, suggesting that physiologically

A) they probably provide no really useful function.
B) there can be no net synthesis in either direction.
C) the direction of the reaction is determined by the pyridoxine derivatives.
D) the direction of the reaction is determined by the removal of one or more of the products.
E) the enzyme has a very low turnover number.