>3n39A (A:) observed residues (from ATOM records)
sainwnkisddkdlevwnrltsnfwlpekvplsndipawqtltvveqqltmrvftgltll
dtlqnvigapslmpdaltpheeavlsnisfmeavharsyssifstlcqtkdvdaayawse
enaplqrkaqiiqqhyrgddplkkkiasvflesflfysgfwlpmyfssrgkltntadlir
liirdeavhgyyigykyqknmekislgqreelksfafdlllelydnelqytdelyaetpw
addvkaflcynankalmnlgyeplfpaemaevnpailaalsp