label: RAS guanyl nucleotide exchange mediated by SOS1 bound to GRB2 in complex with phosphorylated ERBB4:ERBB2 heterodimers (Bos taurus)
label_lc: ras guanyl nucleotide exchange mediated by sos1 bound to grb2 in complex with phosphorylated erbb4:erbb2 heterodimers (bos taurus)