... three N-terminal do-mains, I–III, of ErbB-1 possess the binding sites specific forEGF. In contrast, the replacement of domain III and ofdomains III and II, resulting in 1 144 -4 and 144 4 -4, respectively, ... chimeric receptors thathave the ErbB-1 cytoplasmic region in common (44 44- 1, 44 41-1, 44 11-1, and 41 11-1), the entire extracellular regionof ErbB-1 or portions thereof () 24 to 615, ) 24 to 47 7, ) 24 to ... domain Iof ErbB -4, such as 44 44- 1, 44 41-1, 44 11-1, and 41 11-1,showed sufficient autophosphorylation in response toNRG1-b1, while those without domain I of ErbB -4 didnot exhibit any NRG1-b1-induced...