Glutathione is a 23356 Da cytoplasmic transferase expressed in bronchoalveloar fluid, heart, islets of langerhans, lacrimal gland, leukocyte, liver, lung, muscle, neutrophil, esophagus placenta, plasma, prostate, red blood cell, saliva, semen, tear, and urine; Antibodies to Glutathione can be used to study reactive oxygen species. Glutathione, also known as glutathion peroxidase, is the full name of GSH.