>1btmA (A:) observed residues (from ATOM records)
rkpiiagnwkmhktlaeavqfvedvkghvppadevisvvcapflfldrlvqaadgtdlki
gaqtmhfadqgaytgevspvmlkdlgvtyvilghserrqmfaetdetvnkkvlaaftrgl
ipiiccgesleereagqtnavvasqvekalagltpeqvkqaviayepiwaigtgksstpe
dansvcghirsvvsrlfgpeaaeairiqyggsvkpdnirdflaqqqidgplvggaslepa
sflqlveagrh