A recombinant human ARG1 partial protein (within amino acids 11-97) was used as the immunogen for the Arginase 1 antibody.
Arginase belongs to the ureohydrolase family of enzymes. Arginase catalyzes the fifth and final step in the urea cycle, a series of biochemical reactions in mammals during which the body disposes of harmful ammonia. Specifically, arginase converts L-arginine into L-ornithine and urea. [Wiki]