CH-CH oxidoreductases
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CH-CH oxidoreductases are oxidoreductase enzymes which convert single bonds and double bonds between two carbon atoms. They are classified under EC number 1.3.
One example is 5-alpha reductase:
Note the major difference -- the Δ4,5 double-bond on the A (leftmost) ring. (The other differences between the diagrams are unrelated to chemical structure.)
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Active site - Binding site - Catalytically perfect enzyme - Coenzyme - Cofactor - EC number - Enzyme catalysis - Enzyme kinetics - Enzyme inhibitor - Lineweaver-Burk plot - Michaelis-Menten kinetics
EC1 Oxidoreductases,O+R+D/list (alcohol oxidoreductases, CH-CH oxidoreductases, peroxidase, oxygenase) - EC2 Transferases/list (methyltransferase, acyltransferase, glycosyltransferase, transaminase, phosphotransferase, polymerase, kinase) - EC3 Hydrolases/list (esterase, DNA glycosylases, glycosidase, protease, acid anhydride hydrolases) - EC4 Lyases/list (carboxy-lyases, aldolase, dehydratase, synthase, adenylate cyclase, guanylate cyclase) - EC5 Isomerases/list (mutase, topoisomerase) - EC6 Ligases/list (DNA ligase, aminoacyl tRNA synthetase)