The pyruvate dehydrogenase complex catalyzes the oxidative decarboxylation of pyruvate to form acetyl‑CoA. E1 , E2 , and E3 are abbreviations for the enzymes of the complex. Classify the enzyme names, prosthetic groups, and reactions as E1 , E2 , or E3 .
a. Dihydrolipoxl (dihydrolipoamide) deydrogenase
b. Thiamine pyrophosphate (TPP) (also called TOP)
c. Lipoamide (or lipoate)
d. FAD