Identification of synaptic acetylcholine receptor sites in retina with peroxidase-labeled α-bungarotoxin

Abstract
An .alpha.-bungarotoxin-horseradish peroxidase conjugate, which bound specifically to nicotinic acetylcholine receptors, was synthesized. This conjugate was bound by 5-7% of the synapses in the inner plexiform layer of the chicken retina. Bipolar ribbon synapses and amacrine synapases bound the conjugate.