Chains and heterogens:
PDB Chain Sequences:
>1gtb_ (-) mspilgywkikglvqptrllleyleekyeehlyerdegdkwrnkkfelglefpnlpyyid gdvkltqsmaiiryiadkhnmlggcpkeraeismlegavldirygvsriayskdfetlkv dflsklpemlkmfedrlchktylngdhvthpdfmlydaldvvlymdpmcldafpklvcfk krieaipqidkylksskyiawplqgwqatfgggdhppk