Chains and heterogens:
PDB Chain Sequences:
>1qrwA (A:) anivggieysinnaslcsvgfsvtrgatkgfvtaghcgtvnatariggavvgtfaarvfp gndrawvsltsaqtllprvangssfvtvrgsteaavgaavchsgrttgyqcgtitaknvt anyaegavrgltqsnacmgrgdsggswitsagqaqgvmsggnvqsngnncgipasqrssl ferlqpilsqyglslvtg