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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: Myosin repertoire expansion coincides with eukaryotic diversification in the Mesoproterozoic era

Fig. 3

Conservation of intron positions within myosin genes. To determine and present patterns of intron position conservation across the myosin classes we plotted all myosin classes in a circular layout using Circos [58]. Orphan myosins represent up to 160 independent classes (see Fig. 1e) and are therefore omitted from this analysis. Myosin classes are represented by bands whose length equals the number of introns conserved in that particular class. Intron positions shared between classes are connected. (a) From outside to inside, the tracks represent (each corresponding to the respective myosin class): index of conserved intron positions (ticks every five intron positions); percentage of genes containing an intron position (one bin per intron position); number of classes sharing an intron position (one bin per intron position); number of sequences. All intron positions shared with class-1 are highlighted. (b) The seven intron positions shared by at least ten classes are highlighted. They most likely represent intron positions present in the ur-myosin. (c) The plot shows the intron positions shared within class-5, −8, and −11 myosin and with any other class (dark grey). Intron positions common to class-5 and class-8 are coloured green, those common to class-5 and class-11 are coloured red, and those common to class-8 and class-11 are coloured blue. (d) All intron positions shared with class-18 myosins are highlighted. All plots were generated with Circos [58]

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