Myeloperoxidase

Myeloperoxidase purified from leucocytes of purulent human sputum which is >98% pure. It is a lysosomal protein stored in azurophilic granules of the neutrophil which produces hypochlorous acid from hydrogen peroxide and chloride anion during the neutrophil’s respiratory burst. Supplied as a lyophilized, salt-free, green soluble powder which is stable for over a year when stored at 5°C. 150 -160 units per mg of protein. 1 unit will decompose 1 µmole of H2O2 per minute at pH 7.0 and 25°C using 4-amino-antipyrine as hydrogen donor.