Ammonia-Lyases Support, Non-U.S. Gov't 46 article 46 Porphyrins 28 porphyrin 26 Animal 24 Liver 24 ammonia lyase 24 Human 22 Porphobilinogen Synthase 22 porphobilinogenase 22 Ammonia Lyases 20 Hydroxymethylbilane Synthase 20 Kinetics 20 nonhuman 20 porphobilinogen deaminase 20 Erythrocytes 18 Female 18 Heme 18 Molecular Weight 18 liver 18 metabolism 18 porphobilinogen synthase 18 5-Aminolevulinate Synthetase 16 Hydrogen-Ion Concentration 16 Porphyria 16 enzymology 16 porphyria 16 priority journal 16 5 aminolevulinate synthase 14