All are true about isozymes of lactate dehydrogenase (LDH) that are present in a number of different tissues EXCEPT:
A) They have differing Km values for lactate. B) The amount of subunit phosphorylation differs. C) They have differing Km values for pyruvate. D) The ratios of A and B subunits differ depending upon the tissue type E) They have different kinetic parameters.