Chains and heterogens:
PDB Chain Sequences:
>1v4uA (A:) ttlsdkdkstvkalwgkisksadaigadalgrmlavypqtktyfshwpdmspgsgpvkah gkkvmggvalavskiddlttglgdlselhafkmrvdpsnfkilshcilvvvakmfpkeft pdahvsldkflasvalalaeryr
>1v4uB (B:) vewtqqersiiagifanlnyedigpkalarclivypwtqryfgaygdlstpdaikgnaki aahgvkvlhgldravknmdnineayselsvlhsdklhvdpdnfrilgdcltvviaanlgd aftvetqcafqkflavvvfalgrkyh
>1v4uB (B:) vewtqqersiiagifanlnyedigpkalarclivypwtqryfgaygdlstpdaikgnaki aahgvkvlhgldravknmdnineayselsvlhsdklhvdpdnfrilgdcltvviaanlgd aftvetqcafqkflavvvfalg
>1v4uC (C:) ttlsdkdkstvkalwgkisksadaigadalgrmlavypqtktyfshwpdmspgsgpvkah gkkvmggvalavskiddlttglgdlselhafkmrvdpsnfkilshcilvvvakmfpkeft pdahvsldkflasvalalaeryr
>1v4uD (D:) vewtqqersiiagifanlnyedigpkalarclivypwtqryfgaygdlstpdaikgnaki aahgvkvlhgldravknmdnineayselsvlhsdklhvdpdnfrilgdcltvviaanlgd aftvetqcafqkflavvvfalgrkyh
>1v4uD (D:) vewtqqersiiagifanlnyedigpkalarclivypwtqryfgaygdlstpdaikgnaki aahgvkvlhgldravknmdnineayselsvlhsdklhvdpdnfrilgdcltvviaanlgd aftvetqcafqkflavvvfalg