Chains and heterogens:
PDB Chain Sequences:
>1j77A (A:) altfakrlkadttavhdsvdnlvmsvqpfvskenyikflklqsvfhkavdhiykdaelnk aipeleymarydavtqdlkdlgeepykfdkelpyeagnkaigwlycaegsnlgaaflfkh aqkldyngehgarhlaphpdgrgkhwrafvehlnalnltpeaeaeaiqgareafafykvv lretfglaadaeapegmmph