>2f4pA (A:) observed residues (from ATOM records)
vddifergskgssdfftgnvwvkmlvtdengvfntqvydvvfepgarthwhshpggqili
vtrgkgfyqergkparilkkgdvveippnvvhwhgaapdeelvhigistqvhlgpaewlg
svteeeyrkategk