despite the high affinity of chicken cardiac muscarinic receptors for pirenzepine , affinity estimates for dicyclomine ( pki = 8.0 ) , cpps ( pki = 8.4 ) and 4damp ( pki = 8.6 ) in chicken heart were not consistent with the presence of m1 receptors .
C0034826
muscarinic receptors
C0531859
m1 receptors