Chains and heterogens:
PDB Chain Sequences:
>1b9yA (A:) mseldqlrqeaeqlknqirdarkacadatlsqitnnidpvgriqmrtrrtlrghlakiya mhwgtdsrlllsasqdgkliiwdsyttnkvhaiplrsswvmtcayapsgnyvacggldni csiynlktregnvrvsrelaghtgylsccrflddnqivtssgdttcalwdietgqqtttf tghtgdvmslslapdtrlfvsgacdasaklwdvregmcrqtftghesdinaicffpngna fatgsddatcrlfdlradqelmtyshdniicgitsvsfsksgrlllagyddfncnvwdal kadragvlaghdnrvsclgvtddgmavatgswdsflkiwn
>1b9yB (B:) mpviniedltekdklkmevdqlkkevtlermlvskcceefrdyveersgedplvkgiped knpfkelk
>1b9yC (C:) meeaasqsleedfegqathtgpkgvindwrkfklesedgdsippskkeilrqmsspqsrd dkdskermsrkmsiqeyelihqdkedegclrkyrrqcmqdmhqklsfgprygfvyeletg eqfletiekeqkvttivvniyedgvrgcdalnssleclaaeypmvkfckirasntgagdr fssdvlptllvykggelisnfisvaeqfaedffaadvesflneygllpereihdlgqtnt ededie
>1b9yC (C:) egqathtgpkgvindwrkfklesegclrkyrrqcmqdmhqklsfgprygfvyeletgeqf letiekeqkvttivvniyedgvrgcdalnssleclaaeypmvkfckirasntgagdrfss dvlptllvykggelisnfisvaeqfaedffaadvesflneygllper