Chains and heterogens:
PDB Chain Sequences:
>1b7fA (A:) asntnlivnylpqdmtdrelyalfraigpintcrimrdyktgysygyafvdftsemdsqr aikvlngitvrnkrlkvsyarpggesikdtnlyvtnlprtitddqldtifgkygsivqkn ilrdkltgrprgvafvrynkreeaqeaisalnnvipeggsqplsvrla
>1b7fA (A:) sntnlivnylpqdmtdrelyalfraigpintcrimrdyktgysygyafvdftsemdsqra ikvlngitvrnkrlkvsyarpggesikdtnlyvtnlprtitddqldtifgkygsivqkni lrdkltgrprgvafvrynkreeaqeaisalnnvipeggsqplsvrla
>1b7fB (B:) asntnlivnylpqdmtdrelyalfraigpintcrimrdyktgysygyafvdftsemdsqr aikvlngitvrnkrlkvsyarpggesikdtnlyvtnlprtitddqldtifgkygsivqkn ilrdkltgrprgvafvrynkreeaqeaisalnnvipeggsqplsvrla
>1b7fB (B:) sntnlivnylpqdmtdrelyalfraigpintcrimrdyktgysygyafvdftsemdsqra ikvlngitvrnkrlkvsyarpggesikdtnlyvtnlprtitddqldtifgkygsivqkni lrdkltgrprgvafvrynkreeaqeaisalnnvipeggsqplsvrla