article molecular weight 238 Molecular Weight 180 nonhuman 160 priority journal 148 controlled study 96 metabolism 88 Animals 82 Support, Non-U.S. Gov't 78 unclassified drug 64 Kinetics 58 animal 56 enzyme activity 52 enzymology 52 Animal 50 isolation and purification 46 Trypanosoma cruzi 44 chemistry 44 Molecular Sequence Data 40 Humans 36 human 36 male 36 Chromatography, Gel 34 animal cell 34 biosynthesis 34 Electrophoresis, Polyacrylamide Gel 30 kinetics 30 pH 30 Amino Acid Sequence 28 Hydrogen-Ion Concentration 28