>4nt0A (A:) observed residues (from ATOM records)
rsrrvdvmdvmnrlilamdlmnrddalrvtgevreyidtvkigyplvlsegmdiiaefrk
rfgcriiadfkvadipetnekicratfkagadaiivhgfpgadsvraclnvaeemgrevf
lltemshpgaemfiqgaadeiarmgvdlgvknyvgpstrperlsrlreiigqdsflispg
etlrfadaiivgrsiyladnpaaaaagiiesik