>1txdA (A:) observed residues (from ATOM records)
ppnwqqlvsrevllglkpceikrqevinelfyterahvrtlkvldqvfyqrvsregilsp
selrkifsnledilqlhiglneqmkavrkrnetsvidqigedlltwfsgpgeeklkhaaa
tfcsnqpfalemiksrqkkdsrfqtfvqdaesnplcrrlqlkdiiptqmqrltkypllld
niakytewpterekvkkaadhcrqilnfvnqavkeaenkqrledyqrrldtsslveelrn
ldltkrkmihegplvwkvnrdktidlytllledilvllqkqddrlvlrctfspviklstv
lvrqvatnkalfvismsdngaqiyelvaqtvsektvwqdlicrmaasvkeqs