title: Purification and some properties of arginase from human lung.
abstract: Arginase from human lung has been isolated and purified about 100-fold. During the purification procedure the enzyme was stabilized by Mn2+. The molecular weight determined by Sephadex G-150 gel filtration was found to be 120 000. The enzyme is highly specific towards L-arginine. Incubation of the enzyme with EDTA for 60 min at pH 7.5 and 37 degrees C results in dissociation into inactive subunits of mol. wt. 30 000. On addition of Mn2+ ion to the inactivated enzyme, the subunits reassociate into the native form of the enzyme of mol. wt. 120 000, and the activity is restored.
mesh_terms: D000328:Adult; D001119:Arginase / Q000302:isolation & purification / Q000378:metabolism*; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004492:Edetic Acid / Q000494:pharmacology; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008168:Lung / Q000201:enzymology*; D008345:Manganese / Q000494:pharmacology; D008970:Molecular Weight
chemical_list: D008345:Manganese; D004492:Edetic Acid; D001119:Arginase