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Muscarinic cholinergic receptors in rabbit retina

Binding sites with high affinity and specificity for [3 H]‐quinuclidinyl benzilate are present in rabbit retinal homogenates. Only one set of binding sites was detected with an apparent dissociation constant of 2.13 times 10−10 M and a density of 59.2 fmol mg−1 of protein. The pharmacological characteristics of specific binding were similar to those in the goldfish, chicken and cow.