>1xxxF (F:) observed residues (from ATOM records)
gfdvaarlgtlltamvtpfsgdgsldtataarlanhlvdqgcdglvvsgttgesptttdg
ekiellravleavgdrarviagagtydtahsirlakacaaegahgllvvtpyyskppqrg
lqahftavadatelpmllydipgrsavpiepdtiralashpnivgvkdakadlhsgaqim
adtglayysgddalnlpwlamgatgfisviahlaagqlrellsafgsgdiatarkiniav
aplcnamsrlggvtlskaglrlqgidvgdprlpqvaatpeqidalaadmraasvlr