Muscarinic cholinergic receptors in rabbit retina

Binding sites with high affinity and specificity for [3H]-quinuclidinyl benzilate are present in rabbit retinal homogenates. Only one set of binding sites was detected with an apparent dissociation constant of 2.13 X 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.