Chains and heterogens:
PDB Chain Sequences:
>1b9xA (A:) mseldqlrqeaeqlknqirdarkacadatlsqitnnidpvgriqmrtrrtlrghlakiya mhwgtdsrlllsasqdgkliiwdsyttnkvhaiplrsswvmtcayapsgnyvacggldni csiynlktregnvrvsrelaghtgylsccrflddnqivtssgdttcalwdietgqqtttf tghtgdvmslslapdtrlfvsgacdasaklwdvregmcrqtftghesdinaicffpngna fatgsddatcrlfdlradqelmtyshdniicgitsvsfsksgrlllagyddfncnvwdal kadragvlaghdnrvsclgvtddgmavatgswdsflkiwn
>1b9xB (B:) mpviniedltekdklkmevdqlkkevtlermlvskcceefrdyveersgedplvkgiped knpfkelk
>1b9xC (C:) egqathtgpkgvindwrkfklesedgdsippskkeilrqmsspqsrddkdskermsrkme iqeyelihqdkedegclrkyrrqcmqdmhqklsfgprygfvyeletgeqfletiekeqkv ttivvniyedgvrgcdalnssleclaaeypmvkfckirasntgagdrfssdvlptllvyk ggelisnfisvaeqfaedffaadvesflneygllper
>1b9xC (C:) egqathtgpkgvindwrkfklesedegclrkyrrqcmqdmhqklsfgprygfvyeletge qfletiekeqkvttivvniyedgvrgcdalnssleclaaeypmvkfckirasntgagdrf ssdvlptllvykggelisnfisvaeqfaedffaadvesflneygllper