Used in research to study nitrogen metabolism and urea cycle regulation by catalyzing the hydrolysis of L-arginine to L-ornithine and urea. Employed in enzyme assays and biochemical studies to understand arginine depletion in immune responses and cell signaling. Applied in diagnostic kits to measure arginase activity in liver function tests. Supports studies in immunology and cancer research due to its role in modulating L-arginine levels, which affects T-cell function and nitric oxide synthesis. Also used in the development of enzyme-based biosensors and in biotechnology for the production of ornithine and related compounds.