Intron phase distributions predicted using the all-pattern intron insertion model and mutation correction. Error is measured as the average of χ2 values between the observed and predicted intron phase distributions in 20 simulations for mutation correction. The 10 eukaryotes are arranged in descending order of GC contents (%) from left to right. N. cra, N. crassa; D. mel, D. melanogaster; H. sap, H. sapiens; F. gra, F. graminearum; C. neo, C. neoformans; X. tro, X. tropicalis; A. tha, A. thaliana; C. ele, C. elegans; S. pom, S. pombe; P. fal, P. falciparum. * Not significant at the P < 0.05 level. All other comparisons were significant.