Enzymes
Tryprotophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consist of

a protein A and one-subunit a
a protein designated B
a protein designated A
two proteins designated A and B

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Enzymes
The E.coli pyruvic acid dehydrogenase complex is reported to

Catalyze the reduction of pyruvic acid to acetyl Co A and CO2
Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2
retard the reduction of pyruvic acid to acetyl Co A and CO2
decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2

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Enzymes
Before they can react, many molecules need to be destabilized. This state is typically achieved through

changing the three-dimensional shape of the molecule
changing the reaction from a biosynthetic to a catabolic pathway
the input of a small amount of activation energy
oxidizing the molecules by removing electrons

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