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. 2006 Mar 3;2(3):e25. doi: 10.1371/journal.pgen.0020025

Figure 2. Parsimony Analysis of the CRPS13/MRPS15 Shared Position (K = 100).

Figure 2

The phylogenetic distribution of the intron position shared between the CRPS13 and MRPS15 genes is shown. Branches that are predicted to have an intron gain or loss are shown in red and blue, respectively. Organisms that currently possess an intron are shown in yellow. The most parsimonious scenario for the case of parallel intron gain was favored because the cost was smaller.

(A) The parsimonious scenario of intron evolution for the case of intron position conservation. The ancestral intron was lost on five branches leading to CRPS13 genes (P. falciparum, A. thaliana, Di. discoideum, S. pombe, and the ancestral branch of Ca. elegans and Dr. melanogaster) and on two branches leading to MRP15 genes (the ancestral branch of Ca. elegans and Dr. melanogaster and the terminal branch to Ci. intestinalis).

(B) The most parsimonious scenario of intron evolution for the case of parallel intron gain. An intron was gained on the ancestral branch of Ci. intestinalis, O. laptides, and H. sapiens in the CRP lineage, and another intron was gained on the ancestral branch of O. laptides and H. sapiens in the MRP lineage. The tree is based on data from Hedges [31].

At, A. thaliana; Ce, Ca. elegans; Ci, Ci. intestinalis; Dd, Di. discoideum; Dm, Dr. melanogaster; Hs, H. sapiens; Ol, O. laptides; Pf, P. falciparum; Sp, S. pombe.