>3prvF (F:) observed residues (from ATOM records)
tsertfiavkpdgvqrclvgeiiqrfekkgyklvalkmlqpsaeqaqqhyidlaskpfyk
dlvayfssgpivgmvwegkgvvkggrvllgatnpadslpgtirgdfavdvgrnvchgsds
vdsakreiafwfkpeelvnwtshsvkqvye