Chains and heterogens:
PDB Chain Sequences:
>1txdA (A:) gsppnwqqlvsrevllglkpceikrqevinelfyterahvrtlkvldqvfyqrvsregil spselrkifsnledilqlhiglneqmkavrkrnetsvidqigedlltwfsgpgeeklkha aatfcsnqpfalemiksrqkkdsrfqtfvqdaesnplcrrlqlkdiiptqmqrltkypll ldniakytewpterekvkkaadhcrqilnfvnqavkeaenkqrledyqrrldtsslklse ypnveelrnldltkrkmihegplvwkvnrdktidlytllledilvllqkqddrlvlrchs kilastadskhtfspviklstvlvrqvatdnkalfvismsdngaqiyelvaqtvsektvw qdlicrmaasvkeqsvdgghhhhhh
>1txdA (A:) ppnwqqlvsrevllglkpceikrqevinelfyterahvrtlkvldqvfyqrvsregilsp selrkifsnledilqlhiglneqmkavrkrnetsvidqigedlltwfsgpgeeklkhaaa tfcsnqpfalemiksrqkkdsrfqtfvqdaesnplcrrlqlkdiiptqmqrltkypllld niakytewpterekvkkaadhcrqilnfvnqavkeaenkqrledyqrrldtsslveelrn ldltkrkmihegplvwkvnrdktidlytllledilvllqkqddrlvlrctfspviklstv lvrqvatnkalfvismsdngaqiyelvaqtvsektvwqdlicrmaasvkeqs