Chains and heterogens:
PDB Chain Sequences:
>1qq4A (A:) anivggieysinnaslcsvgfsvtrgatkgfvtaghcgtvnatariggavvgtfaarvfp gndrawvsltsaqtllprvangssfvtvrgsteaavgaavchsgrttgyqcgtitaknvt anyaegavrgltqsnacmgrgdsggswitsagqaqgvmsggnvqsngnncgipasqrssl ferlqpilsqyglslvtg