>4filB (B:) observed residues (from ATOM records)
pkriavvaptyagglkklganivavnqqvdqskvlkdkfkgvtkigdgdvekvakekpdl
iivystdkdiaayqavaptvvvdynkhkyleqqemlgkivgkedkvkawkkdweettakd
gkeikkaigqdatvslfdefdkklytygdnwgrggevlyqafglkmqpeqqkltakagwa
evkqeeiekyagdyivstsegkptpgyestnmwknlkatkeghivkvdagtywyndpytl
dfmrkdlkeklikaak