>4rcoB (B:) observed residues (from ATOM records)
npkfkdlrayytkpslefkneigiilkkwttirfmnvvpdyfiykialvgkddkkygegv
hrnvdvfvvleennynlekysvggitksnskkvdhkagvritkednkgtishdvsefkit
keqislkeldfklrkqlieknnlygnvgsgkivikmknggkytfelhkklqenrmadvid
gtnidnievnik