Chains and heterogens:
PDB Chain Sequences:
>1b3jA (A:) ephslrynltvlswdgsvqsgfltevhldgqpflrcdrqkcrakpqgqwaedvlgnktwd retrdltgngkdlrmtlahikdqkeglhslqeirvceihednstrssqhfyydgelflsq nletkewtmpqssraqtlamnvrnflkedamktkthyhamhadclqelrrylksgvvlrr tvppmvnvtrseasegnitvtcrasgfypwnitlswrqdgvslshdtqqwgdvlpdgngt yqtwvatricqgeeqrftcymehsgnhsthpvps
>1b3jA (A:) ephslrynltvlswdgsvqsgfltevhldgqpflrcdrqkcrakpqgqwaedvlgnktwd retrdltgngkdlrmtlahikdqkeglhslqeirvceihednstrssqhfyydgelflsq nletkewtmpqssraqtlamnvrnflkedamadclqelrrylksgvvlrrtvppmvnvtr seasegnitvtcrasgfypwnitlswrqdgvslshdtqqwgdvlpdgngtyqtwvatric qgeeqrftcymehsgnhsthpvps