Intracellular Localization of Nitrate Reductase in Neurospora crassa

Abstract
Nitrate reductase was localized in mycelial cells of N. crassa by immunohistochemical labeling with ferritin. The enzyme is present in the cell wall-plasmalemma region and in the tonoplast membranes. [Since the enzyme can be activated by blue light it may function as a photoreceptor.].