Exon-intron structures of E. festucae SLPs. Exon-intron structures of the E. festucae SLP like genes: proteinase K (A), fungal pyrolysins (B), and kexins (C). Each exon is indicated by a separate rectangle, with spaces between rectangles representing introns. Intron positions found in each family are indicated by numbers between exons. All scale bars indicate a length of 100 bp.