PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22309577-6 2012 Moreover, for oocytes expressing nAChR containing any alpha subunit plus beta4 and beta3(V9"S) subunits, there is spontaneous channel opening sensitive to blockade by the open channel blocker, atropine. Atropine 193-201 basic helix-loop-helix family member e23 L homeolog Xenopus laevis 73-78