pirenzepine inhibition of [ 3h ] n-methylscopolamine ( [ 3h ] nms ) binding was studied in membranous , digitonin-solubilized , and partially purified muscarinic receptors from bovine cortex , an area of the brain rich in the putative m1 muscarinic receptor subtype , and from pons-medulla , an area rich in the putative m2 subtype .
C0034826
muscarinic
C0531859
m1