Chains and heterogens:
PDB Chain Sequences:
>1ex1A (A:) dyvlykdatkpvedrvadllgrmtlaekigqmtqierlvatpdvlrdnfigsllsgggsv prkgatakewqdmvdgfqkacmstrlgipmiygidavhgqnnvygatifphnvglgatrd pylvkrigeatalevratgiqyafapciavcrdprwgrcyesysedrrivqsmtelipgl qgdvpkdftsgmpfvagknkvaacakhfvgdggtvdginenntiinreglmnihmpaykn amdkgvstvmisysswngvkmhanqdlvtgylkdtlkfkgfvisdwegidrittpagsdy sysvkasilagldmimvpnkyqqfisiltghvnggvipmsriddavtrilrvkftmglfe npyadpamaeqlgkqehrdlareaarkslvllkngktstdapllplpkkapkilvagsha dnlgyqcggwtiewqgdtgrttvgttileavkaavdpstvvvfaenpdaefvksggfsya ivavgehpytetkgdnlnltipepglstvqavcggvrcatvlisgrpvvvqpllaasdal vaawlpgsegqgvtdalfgdfgftgrlprtwfksvdqlpmnvgdahydplfrlgyglttn atkky
>1ex1A (A:) dyvlykdatkpvedrvadllgrmtlaekigqmtqierlvatpdvlrdnfigsllsgggsv prkgatakewqdmvdgfqkacmstrlgipmiygidavhgqnnvygatifphnvglgatrd pylvkrigeatalevratgiqyafapciavcrdprwgrcyesysedrrivqsmtelipgl qgdvpkdftsgmpfvagknkvaacakhfvgdggtvdginenntiinreglmnihmpaykn amdkgvstvmisysswngvkmhanqdlvtgylkdtlkfkgfvisdwegidrittpagsdy sysvkasilagldmimvpnkyqqfisiltghvnggvipmsriddavtrilrvkftmglfe npyadpamaeqlgkqehrdlareaarkslvllkngktstdapllplpkkapkilvagsha dnlgyqcggwtiewqgdtgrttvgttileavkaavdpstvvvfaenpdaefvksggfsya ivavgehpytetkgdnlnltipepglstvqavcggvrcatvlisgrpvvvqpllaasdal vaawlpgsegqgvtdalfgdfgftgrlprtwfksvdqlpmnvgdahydplfrlgyglttn at