>4lrtA (A:) observed residues (from ATOM records)
aprvritdstlrdgshamahqfteeqvratvhaldaagvevievshgdglggssfnygfs
avdeidlvaaavdeavnakiavlllpgvgtvrdlkrahdagasvariathcteadvscqh
faaarelgmetvgflmlahrigpeelarqarimvdagaqcvyvvdsagalvlsdvqarvq
alvreigheaqvgfhghqnlslgvansvlayqngarqidgalcalgagagnspteilaat
ferlnietgvnvqaalaaaeevvrpylprlpwadraaivqgyagvyssfllhaeraaery
gvpaheilqrvgeagyvggqedmiidiavqlaee