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A scale diagram of the intron positions mapped on the α-actinin protein sequence relative to the Dmel sequence. The diagram spans residues 39–844 with the first and last exons omitted. The green triangles represent conserved introns, and red triangles represent intron gains based on parsimony. The human α-actinin-1 was abbreviated to Hsap. The first and last triangles on Hsap represent first and last introns, respectively.
