Animal liver Liver 139 article 106 Support, Non-U.S. Gov't 103 Rats 82 rat 78 animal 75 nonhuman 69 animal experiment 68 metabolism 60 enzymology 50 Porphyrins 43 Kinetics 41 in vitro study 40 Male 37 porphyrin 35 Mice 33 mouse 33 5-Aminolevulinate Synthetase 32 Female 31 biosynthesis 31 priority journal 30 porphyria 27 5 aminolevulinate synthase 26 Glucose 24 Heme 24 Hydrogen-Ion Concentration 24 Carboxy-Lyases 22 isolation and purification 22