>1ff3B (B:) observed residues (from ATOM records)
slfdkkhlvspadalpgrntpmpvatlhavnghsmtnvpdgmeiaifamgcfwgverlfw
qlpgvystaagytggytpnptyrevcsgdtghaeavrivydpsvisyeqllqvfwenhdp
aqgmrqgndhgtqyrsaiypltpeqdaaaraslerfqaamlaadddrhitteianatpfy
yaeddhqqylhknp