Chains and heterogens:
PDB Chain Sequences:
>1eh4A (A:) nvvgvhykvgrrigegsfgvifegtnllnnqqvaikfeprrsdapqlrdeyrtykllagc tgipnvyyfgqeglhnvlvidllgpsledlldlcgrkfsvktvamaakqmlarvqsihek slvyrdikpdnfligrpnsknanmiyvvdfgmvkfyrdpvtkqhipyrekknlsgtarym sinthlgreqsrrddlealghvfmyflrgslpwqglkaatnkqkyerigekkqstplrel cagfpeefykymhyarnlafdatpdydylqglfskvlerlnttedenfdwnll
>1eh4B (B:) nvvgvhykvgrrigegsfgvifegtnllnnqqvaikfeprrsdapqlrdeyrtykllagc tgipnvyyfgqeglhnvlvidllgpsledlldlcgrkfsvktvamaakqmlarvqsihek slvyrdikpdnfligrpnsknanmiyvvdfgmvkfyrdpvtkqhipyrekknlsgtarym sinthlgreqsrrddlealghvfmyflrgslpwqglkaatnkqkyerigekkqstplrel cagfpeefykymhyarnlafdatpdydylqglfskvlerlnttedenfdwnll