>3sizB (B:) observed residues (from ATOM records)
mdvmnrlilamdlmnrddalrvtgevreyidtvkigyplvlsegmdiiaefrkrfgcrii
adfkvadipetnekicratfkagadaiivhgfpgadsvraclnvaeemgrevflltemah
pgaemfiqgaadeiarmgvdlgvknyvgpstrperlsrlreiigqdsflispgvgaqggd
pgetlrfadaiivgrsiyladnpaaaaagiiesikdll