Chains and heterogens:
PDB Chain Sequences:
>1p12E (E:) anivggieysinnaslcsvgfsvtrgatkgfvtaghcgtvnatariggavvgtfaarvfp gndrawvsltsaqtllprvangssfvtvrgsteaavgaavcrsgrttgyqcgtitaknvt anyaegavrgltqgnacmgrgdsggswitsagqaqgvmsggnvqsngnncgipasqrssl ferlqpilsqyglslvtg