Chains and heterogens:
PDB Chain Sequences:
>1b43A (A:) gvpigeiiprkeielenlygkkiaidalnaiyqflstirqkdgtplmdskgritshlsgl fyrtinlmeagikpvyvfdgeppefkkkelekrreareeaeekwrealekgeieearkya qratrvnemliedakkllelmgipivqapsegeaqaaymaakgsvyasasqdydsllfga prlvrnltitgkrklpgknvyveikpeliileevlkelkltreklielailvgtdynpgg ikgiglkkaleivrhskdplakfqkqsdvdlyaikefflnppvtdnynlvwrdpdeegil kflcdehdfseervknglerlkkaiksgkqstleswfkr
>1b43B (B:) gvpigeiiprkeielenlygkkiaidalnaiyqflstirqkdgtplmdskgritshlsgl fyrtinlmeagikpvyvfdgeppefkkkelekrreareeaeekwrealekgeieearkya qratrvnemliedakkllelmgipivqapsegeaqaaymaakgsvyasasqdydsllfga prlvrnltitgkrklpgknvyveikpeliileevlkelkltreklielailvgtdynpgg ikgiglkkaleivrhskdplakfqkqsdvdlyaikefflnppvtdnynlvwrdpdeegil kflcdehdfseervknglerlkkaiksgkqstleswfkr