extracts of glucose-grown cells contained detectable levels of all tricarboxylic acid cycle enzymes except aconitase ( ec 4.2.1.3 ) , isocitrate dehydrogenase ( ec 1.1.1.42 ) , and a pyridine nucleotide-dependent malate dehydrogenase ( ec 1.1.1.37 ) .
C0024544
malate dehydrogenase
C0030016
ec 1