Chains and heterogens:
PDB Chain Sequences:
>2alp_ (-) anivggieysinnaslcsvgfsvtrgatkgfvtaghcgtvnatariggavvgtfaarvfp gndrawvsltsaqtllprvangssfvtvrgsteaavgaavcrsgrttgyqcgtitaknvt anyaegavrgltqgnacmgrgdsggswitsagqaqgvmsggnvqsngnncgipasqrssl ferlqpilsqyglslvtg