>3donA (A:) observed residues (from ATOM records)
mkfavignpishslsplmhhanfqslnlentyeainvpvnqfqdikkiiseksidgfnvt
iphkeriipylddineqaksvgavntvlvkdgkwigyntdgigyvnglkqiyegiedayi
lilgaggaskgianelykivrptltvanrtmsrfnnwslninkinlshaeshldefdiii
nttpdsvislnrlashtlvsdivynpyktpilieaeqrgnpiyngldmfvhqgaesfkiw
tnlepdikamkniviqklkgelle