>4nx5B (B:) observed residues (from ATOM records)
vmdvmnrlilamdlmnrddalrvtgevreyidtvkigyplvlsegmdiiaefrkrfgcri
iadfkvadipetnekicratfkagadaiivhgfpgadsvraclnvaeemgrevflltems
hpgaemfiqgaadeiarmgvdlgvknyvgpstrperlsrlreiigqdsflispgvgaqgg
dpgetlrfadaiivgrsiyladnpaaaaagiiesikdll