Chains and heterogens:
PDB Chain Sequences:
>1xtbA (A:) maaltrnpqfqklqqwhrehgselnlrhlfdtdkerfnhfsltlntnhghilldysknlv teevmhmlldlaksrgveaaresmfngekinstedravlhvalrnrsntpivvdgkdvmp evnkvldkmkafcqrvrsgdwkgytgktitdvinigiggsdlgplmvtealkpyssggpr vwfvsnidgthiaktlaclnpesslfiiasktfttqetitnaktakdwfllsakdpstva khfvalstntakvkefgidpqnmfefwdwvggryslwsaiglsialhvgfdnfeqllsga hwmdqhfrttpleknapvllamlgiwyincfgcetqavlpydqylhrfaayfqqgdmesn gkyitksgarvdhqtgpivwgepgtngqhafyqlihqgtkmipcdflipvqtqhpirkgl hhkillanflaqtealmkgksteearkelqaagkspedlmkllphkvfegnrptnsivft kltpfilgaliamyehkifvqgvvwdinsfdqwgvelgkqlakkiepeldgsspvtshds stnglinfikqqreakiq
>1xtbA (A:) aaltrnpqfqklqqwhrehgselnlrhlfdtdkerfnhfsltlntnhghilldysknlvt eevmhmlldlaksrgveaaresmfngekinstedravlhvalrnrsntpivvdgkdvmpe vnkvldkmkafcqrvrsgdwkgytgktitdvinigiggsdlgplmvtealkpyssggprv wfvsnidgthiaktlaclnpesslfiiasktfttqetitnaktakdwfllsakdpstvak hfvalstntakvkefgidpqnmfefwdwvggryslwsaiglsialhvgfdnfeqllsgah wmdqhfrttpleknapvllamlgiwyincfgcetqavlpydqylhrfaayfqqgdmesng kyitksgarvdhqtgpivwgepgtngqhafyqlihqgtkmipcdflipvqtqhpirkglh hkillanflaqtealmkgksteearkelqaagkspedlmkllphkvfegnrptnsivftk ltpfilgaliamyehkifvqgvvwdinsfdqwgvelgkqlakkiepeldgsspvtshdss tnglinfikqqreaki
>1xtbB (B:) maaltrnpqfqklqqwhrehgselnlrhlfdtdkerfnhfsltlntnhghilldysknlv teevmhmlldlaksrgveaaresmfngekinstedravlhvalrnrsntpivvdgkdvmp evnkvldkmkafcqrvrsgdwkgytgktitdvinigiggsdlgplmvtealkpyssggpr vwfvsnidgthiaktlaclnpesslfiiasktfttqetitnaktakdwfllsakdpstva khfvalstntakvkefgidpqnmfefwdwvggryslwsaiglsialhvgfdnfeqllsga hwmdqhfrttpleknapvllamlgiwyincfgcetqavlpydqylhrfaayfqqgdmesn gkyitksgarvdhqtgpivwgepgtngqhafyqlihqgtkmipcdflipvqtqhpirkgl hhkillanflaqtealmkgksteearkelqaagkspedlmkllphkvfegnrptnsivft kltpfilgaliamyehkifvqgvvwdinsfdqwgvelgkqlakkiepeldgsspvtshds stnglinfikqqreakiq
>1xtbB (B:) aaltrnpqfqklqqwhrehgselnlrhlfdtdkerfnhfsltlntnhghilldysknlvt eevmhmlldlaksrgveaaresmfngekinstedravlhvalrnrsntpivvdgkdvmpe vnkvldkmkafcqrvrsgdwkgytgktitdvinigiggsdlgplmvtealkpyssggprv wfvsnidgthiaktlaclnpesslfiiasktfttqetitnaktakdwfllsakdpstvak hfvalstntakvkefgidpqnmfefwdwvggryslwsaiglsialhvgfdnfeqllsgah wmdqhfrttpleknapvllamlgiwyincfgcetqavlpydqylhrfaayfqqgdmesng kyitksgarvdhqtgpivwgepgtngqhafyqlihqgtkmipcdflipvqtqhpirkglh hkillanflaqtealmkgksteearkelqaagkspedlmkllphkvfegnrptnsivftk ltpfilgaliamyehkifvqgvvwdinsfdqwgvelgkqlakkiepeldgsspvtshdss tnglinfikqqreaki