>1r3nA (A:) observed residues (from ATOM records)
gtlnlpaaaplsiasgrlnqtiletgsqfggvarwgqeshefgmrrlagtaldgamrdwf
tneceslgckvkvdkignmfavypgknggkptatgshldtqpeagkydgilgvlaglevl
rtfkdnnyvpnydvcvvvwfneegarfarsctgssvwshdlsleeayglmsvgedkpesv
ydslknigyigdtpasykeneidahfelhieqgpiledenkaigivtgvqaynwqkvtvh
gvgahagttpwrlrkdallmsskmivaaseiaqrhnglftcgiidakpysvniipgevsf
tldfrhpsddvlatmlkeaaaefdrlikindggalsyesetlqvspavnfhevciecvsr
safaqfkkdqvrqiwsgaghdscqtaphvptsmifipskdglshnyyeysspeeiengfk
vllqaiinydnyrvirgh