Brief Report: Ultrastructural Localization of Myeloperoxidase in Human Neutrophil and Rabbit Heterophil and Eosinophil Leukocytes

Abstract

Ultrastructural cytochemical observations revealed peroxidase reactivity in primary (azurophil) granules, but not in secondary (specific) granules, of rabbit and human polymorphonuclear leukocytes. Peroxidase reactivity was also observed in the rough endoplasmic reticulum and granules of rabbit eosinophils and in granules of human monocytes.