>4us1S (S:) observed residues (from ATOM records)
eqmrlpsadvyrfaepdseeniifeenmqpkagipiikagtviklierltyhmyadpnfv
rtflttyrsfckpqellsliierfeipepelsaelkrfrkeyiqpvqlrvlnvcrhwveh
hfydferdayllqrmeefigtvrgkamkkwvesitkiiqrkkiafqsspptvewhisrpg
hietfdlltlhpieiarqltllesdlyravqpselvgsvwtkedkeinspnllkmirhtt
nltlwfekcivetenleervavvsriieilqvfqelnnfngvlevvsamnsspvyrldht
feqipsrqkkileeahelsedhykkylaklrsinppcvpffgiyltnilkteegnpevlk
rhgkelinfskrrkvaeitgeiqqyqnqpyclrvesdikrffenlnpmgnsmekeftdyl
fnksleieprnpkplprfpkkysyplkspgvrpsnp