>1xvfF (F:) observed residues (from ATOM records)
lgihsndtrdawvnkiaqlntlekaaemlkqfrmdhttpfrnsyeldndylwieakleek
vavlkarafnevdfrhktafgedaksvldgtvakmnaakdkweaekihigfrqaykppim
pvnyfldgerqlgtrlmelrnlnyydtpleelrkqrgvrvvhlqsp