The intramitochondrial localization of succinate-yellow tetrazolium reductase with the electron microscope

Abstract

A new tetrazolium salt, yellow tetrazolium, has been used to localise succinatetetrazolium reductase with the electron microscope. As expected, the formazan did not give high contrast in the optical microscope, but localization with the EM was good. The size of the formazan granules was 60–100Å; lead staining was essential to secure good contrast.