Myeloperoxidase (MPO) is a glycosylated hemoprotein contained in the azurophil granules of human polymorphonuclear leukocytes (PMNs). MPO is thought to play a role in the oxidative antimicrobial activity of neutrophils by catalyzing the formation of hypochlorous acid, a potent microbicide, from hydrogen peroxide and chloride anions. Seven unrelated individuals with complete MPO deficiency, a re...
