>6choB (B:) observed residues (from ATOM records)
mqkraiypgtfdpitnghidivtratqmfdhvilaiaaspskkpmftleervalaqqata
hlgnvevvgfsdlmanfarnqhatvlirglravadfeyemqlahmnrhlmpelesvflmp
skewsfissslvkevarhqgdvthflpenvhqalmaklav