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THE FINE STRUCTURAL LOCALIZATION OF ACETYLCHOLINESTERASE ACTIVITY IN THE RETINA AND OPTIC NERVE OF RABBITS

E. REALE 1, L. LUCIANO 1, and M. SPITZNAS 1

1 Francis I. Proctor Foundation for Research in Ophthalmology, Department of Ophthalmology, University of California, San Francisco, California 94122, and the Department of Anatomy, Electron Microscopic Laboratory, Hannover, Germany

In the rabbit retina acetylcholinesterase activity is localized in the perinuclear cisterna, in the cisternae of the rough surfaced endoplasmic reticulum and in the Golgi apparatus of ganglion cells and amacrine cells. The histochemical reaction is positive also in the rough surfaced endoplasmic reticulum of some horizontal cells. The highest activity is seen in the internal plexiform layer; because of artifacts caused by the diffusion of the enzyme, a clear demonstration of relation of the positivity to one or the other regular components of this layer, however, is not possible. Myelinated fibers which exhibit acetylcholinesterase activity and are most probably efferent are found in the internal plexiform layer. In the retinal nerve fiber layer and in the optic nerve only a few fibers show a positive reaction.

Submitted on October 19, 1970


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