Chrna4 protein coding gene Acra-4|alpha4-nAChR|a4 nicotinic receptor|Acra4|alpha4 nAChR O - Gene alpha4 nAChR cholinergic receptor, nicotinic, alpha polypeptide 4 Acra4 a4 nicotinic receptor alpha4-nAChR http://identifiers.org/mgd/MGI:87888 Acra-4 MGI:87888 genetic mapping