thus while only ( + ) - and ( - ) -nicotine interacted with the very high affinity site , acetylcholine , atropine , mecamylamine , lobeline , carbachol , ( + ) -nicotine and ( - ) -nicotine enhanced the binding of ( +/- ) - [ 3h ] nicotine and cytisine , anabasine , cotinine and choline selectively inhibited binding at the high affinity site .
C0006945
carbachol
C0008405
choline