>1r66A (A:) observed residues (from ATOM records)
mrllvtggagfigshfvrqllagaypdvpadevivldsltyagnranlapvdadprlrfv
hgdirdagllarelrgvdaivhfaaeshvdrsiagasvftetnvqgtqtllqcavdagvg
rvvhvstdevygsidsgswtessplepnspyaaskagsdlvarayhrtygldvritrccn
nygpyqhpekliplfvtnlldggtlplygdganvrewvhtddhcrgialvlaggrageiy
higggleltnreltgilldslgadwssvrkvadrkghdlrysldggkierelgyrpqvsf
adglartvrwyrenrgwweplk