From: Insights into the evolution of the ErbB receptor family and their ligands from sequence analysis
 | EGFR | ErbB2 | ErbB3 | ErbB4 | EGF | TGFα | ||||
---|---|---|---|---|---|---|---|---|---|---|
#a | tet | tel | tet | tel | tet | tel | tet | tel | Â | Â |
45 | Tyr | His/Tyr | Tyr | His | Leu | Gln/Met | Ser | Ser | Met/Ile | Arg |
90 | Glub | Gluc | Glud | var | Aspe | Gluf | Glu | Glu | Lys | Lys |
350 | Val | Thr | Glu | var | Thrg | Thrh | Thr | Thr | Leu | Phe |
355 | Asp | Asp | Aspi | Aspi | Asp | Asp | Asp | Asp | Arg | Arg |
357 | Phe | Tyrj | var | var | Trp | Phe/Tyr | Tyr | Tyrk | Tyr | Phe |
384 | Gln | Gln | Serl | Gln | Gluf | Gln | Gln | Gln | Gln/Arg | Glu |