Compound class
 Carbohydrates
 Lipids
 Nucleic acids
 Peptides
 Phytochemical Compounds
 Vitamins and hormones
Activity
 Antibiotics
 Enzyme Ligands
 Enzyme Substrates
	4. Lyases
		4.2  Carbon-oxygen lyases
			4.2.1  Hydro-lyases
				4.2.1.1  carbonate dehydratase 
				4.2.1.11  phosphopyruvate hydratase 
				4.2.1.20  tryptophan synthase 
				4.2.1.22  cystathionine beta-synthase 
				4.2.1.24  porphobilinogen synthase 
				4.2.1.28  propanediol dehydratase 
				4.2.1.3  aconitate hydratase 
				4.2.1.30  glycerol dehydratase 
				4.2.1.32  L(+)-tartrate dehydratase 
				4.2.1.35  (R)-2-methylmalate dehydratase 
				4.2.1.44  myo-inosose-2 dehydratase 
				4.2.1.45  CDP-glucose 4,6-dehydratase 
				4.2.1.46  dTDP-glucose 4,6-dehydratase 
				4.2.1.47  GDP-mannose 4,6-dehydratase 
				4.2.1.49  urocanate hydratase 
				4.2.1.50  pyrazolylalanine synthase 
				4.2.1.81  D(-)-tartrate dehydratase 
				4.2.1.84  nitrile hydratase 
				4.2.1.85  dimethylmaleate hydratase 
 GPCR Ligands
 Ion Channel Ligands
 Nuclear Receptor Ligands
 Transporter Substrates