>3sxrB (B:) observed residues (from ATOM records)
ghmelkreeitllkelvvklgkwkgqydvavkmikegsmsedeffqeaqtmmklshpklv
kfygvcskeypiyivteyisngcllnylrshgkglepsqllemcydvcegmafleshqfi
hrdlaarnclvdrdlcvkvsdfgmtryvlddqyvssvgtkfpvkwsapevfhyfkyssks
dvwafgilmwevfslgkmpydlytnsevvlkvsqghrlyrphlasdtiyqimyscwhelp
ekrptfqqllssieplre