label: Type II Activin Receptor (ActRIIB/ACVR2B) phosphorylates Type I Activin Receptor (ActRIC/ACVR1C) in response to NODAL (Homo sapiens)
label_lc: type ii activin receptor (actriib/acvr2b) phosphorylates type i activin receptor (actric/acvr1c) in response to nodal (homo sapiens)