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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Unexpected conservation of the RNA splicing apparatus in the highly streamlined genome of Galdieria sulphuraria

Fig. 2

Evolution of red algal introns. a The frequencies of single-exon genes and multi-exon genes in six red algal nuclear genomes. The bars in dark grey indicate G. sulphuraria. Abbreviations: Gsu (G. sulphuraria), Cme (C. merolae), Ppu (P. purpureum), Ccr (C. crispus), Gch (G. chorda), Pye (P. yezoensis) and Vir (Viridiplantae). The color scheme is the same as in Fig. 1. b Shared intron positions across algal lineages. The frequencies of lineage-specific intron for each red algal lineage are shown. c Conserved intron positions in G. sulphuraria geranylgeranyl transferase beta-subunit gene. The residues interrupted by intron (phase 2 and 3) or flanking intron (phase 1) are shadowed. The alignment is shown only for the 11-12 residue segments spanning the conserved intron positions. The positions of amino acids refer to those in G. sulphuraria proteins. Introns found only in Viridiplantae are not shown. Full alignment is provided in Additional file 11: Figure S5

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