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Diversity of residues at each position of the Fcs were analyzed using WebLogo 3.1 (http://weblogo.threeplusone.com/create.cgi). (A) Fcs sequences from 1,073 virulent isolates. (B) Fcs sequences from 499 avirulent isolates. Upper panel: frequency of each residue at a given position. Lower panel: Percentages of each amino acid represented in pie graphs.
