“…mRNA expression studies in postnatal rats, which are thought to reflect adult expression patterns, showed an autonomic ganglia-like expression pattern of subunits with relatively high levels of α3, α5, and β4 mRNA and lower levels of β2 mRNA in the myenteric plexus of stomach and intestine and relatively low levels of α3, α5, and β4 mRNA in the submucosal plexus of the intestine (Garza, Huang, Son, & Winzer-Serhan, 2009). A similar pattern was observed in immunohistological experiments with subunit-selective monoclonal antibodies (Obaid, Nelson, Lindstrom, & Salzberg, 2005). Accordingly a large predominance of β4* over β2* nicotinic binding was observed in receptor autoradiography studies (Garza et al, 2009).…”