m1 , m2 , and m3 receptors express binding properties similar to those expected of high affinity pirenzepine-type receptors of cerebral cortex ( `` '' m1 '' '' ) , low affinity pirenzepine-type receptors of atria ( `` '' m2 cardiac type '' '' ) , and the intermediate affinity pirenzepine-type receptors found in exocrine glands ( `` '' m2 glandular type '' '' ) , respectively .
C0018792
f atr
C0018787
card