Cytochemical localization of adenylcyclase in the lateral wall of the inner ear.

The cytochemical localization of adenylcyclase in the lateral cochlear wall was studied using a modification of the Reik -Howell method. All the cell membranes of the stria vascularis and spiral prominence cells, except the vascular endothelium, showed a low enzyme activity. In the marginal cell and spiral prominence epithelium facing the endolymph, this activity was limited to the perilymphatic membrane sections. The results are discussed.