Chains and heterogens:
PDB Chain Sequences:
>1b9nA (A:) gshmqaeilltlklqqklfadprrisllkhialsgsisqgakdagisyksawdainemnq lsehilveratggkggggavltrygqrliqlydllaqiqqkafdvlsdddalplnsllaa isrfslqtsarnqwfgtitardhddvqqhvdvlladgktrlkvaitaqsgarlgldegke vlillkapwvgitqdeavaqnadnqlpgiishiergaeqcevlmalpdgqtlcatvpvne atslqqgqnvtayfnadsviiatlc
>1b9nA (A:) shmqaeilltlklqqklfadprrisllkhialsgsisqgakdagisyksawdainemnql sehilveratgavltrygqrliqlydllaqiqqkafdvlsdddalplnsllaaisrfslq tsarnqwfgtitardhddvqqhvdvlladgktrlkvaitaqsgarlgldegkevlillka pwvgitqdeavaqnadnqlpgiishiergaeqcevlmalpdgqtlcatvpvneatslqqg qnvtayfnadsviiatlc
>1b9nB (B:) gshmqaeilltlklqqklfadprrisllkhialsgsisqgakdagisyksawdainemnq lsehilveratggkggggavltrygqrliqlydllaqiqqkafdvlsdddalplnsllaa isrfslqtsarnqwfgtitardhddvqqhvdvlladgktrlkvaitaqsgarlgldegke vlillkapwvgitqdeavaqnadnqlpgiishiergaeqcevlmalpdgqtlcatvpvne atslqqgqnvtayfnadsviiatlc
>1b9nB (B:) mqaeilltlklqqklfadprrisllkhialsgsisqgakdagisyksawdainemnqlse hilveavltrygqrliqlydllaqiqqkafdvlsdddalplnsllaaisrfslqtsarnq wfgtitaqhvdvlladgktrlkvaitaqsgarlgldegkevlillkapwvgitqdeavaq nadnqlpgiishiergaeqcevlmalpdgqtlcatvpvneatslqqgqnvtayfnadsvi iatlc