>3sxrA (A:) observed residues (from ATOM records)
ghmelkreeitllkelgsvvklgkwkgqydvavkmikegsmsedeffqeaqtmmklshpk
lvkfygvcskeypiyivteyisngcllnylrshgkglepsqllemcydvcegmafleshq
fihrdlaarnclvdrdlcvkvsdfgmtryvlddqyvssvgtkfpvkwsapevfhyfkyss
ksdvwafgilmwevfslgkmpydlytnsevvlkvsqghrlyrphlasdtiyqimyscwhe
lpekrptfqqllssieplre