LOCALIZATION OF ACETYLCHOLINESTERASE IN THE TELEOST RETINA

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Abstract
Acetylcholinesterase is the sole cholinesterase enzyme identifiable histochemically in the teleost retina. Acetylcholinesterase is present in both amacrine and ganglion cells in the retinas of all three species of fish studied. No sign of acetylcholinesterase activity was found in ganglion cell axons either in the nerve fiber layer of the retina or in the optic nerve. Evidence is presented for the presence of acetylcholinesterase activity in additional cell types within the nuclear layer. The distribution of acetylcholinesterase-containing cells in teleost retina is compared to that in other species.