| | caption = Nrg1の上皮成長因子ホモロジードメインの構造.<ref name="pmid8062828">{{cite journal |author=Nagata K |title=Solution structure of the epidermal growth factor-like domain of heregulin-alpha, a ligand for p180erbB-4 |journal=EMBO J. |volume=13 |issue=15 |pages=3517–23 |year=1994 |month=August |pmid=8062828 |pmc=395255 |doi= |url= |author-separator=, |author2=Kohda D |author3=Hatanaka H |display-authors=3 |last4=Ichikawa |first4=S |last5=Matsuda |first5=S |last6=Yamamoto |first6=T |last7=Suzuki |first7=A |last8=Inagaki |first8=F}}</ref>
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