Porphobilinogen-Deaminase Hydroxymethylbilane Synthase 4 Kinetics 4 Support, Non-U.S. Gov't 4 article 4 enzymology 4 isolation and purification 4 kinetics 4 metabolism 4 porphobilinogen deaminase 4 Animal 2 Cell Fractionation 2 Chromatography, Gel 2 Cosynthetase 2 Cytosol 2 Enzyme Activation 2 Euglena gracilis 2 Folic Acid 2 Hydrogen-Ion Concentration 2 Liver 2 Male 2 Models, Theoretical 2 Molecular Weight 2 Nonessential Activation 2 Particulate 2 Phenylmethylsulfonyl Fluoride 2 Porphobilinogen 2 Porphyrin Biosynthesis 2 Porphyrins 2 Protein Binding 2