Fig. 4
From: Recombination of chl-fus gene (Plastid Origin) downstream of hop: a locus of chromosomal instability
Grouping of gene arrangements found for the pair of genes hop and chl-fus, among the 53 plant genomes under study. CO: classification by microcolinearity (categories I to III); GA: classification by gene arrangement, according to the exon–intron structure of both combined hop and chl-fus (categories A to J). Arabic numbers in parenthesis: number of species sharing the same gene arrangement; hop and chl-fus genes are represented by arrows to resume gene topology. Ex-Intr hop: exon–intron organizations found for hop gene (categories h1 to h6), Ex-Intr chl-fus: exon–intron organizations found for chl-fus gene (categories f1 to f5). Arabic and roman numbers represent intron phase (0, 1, or 2) and succession of introns from I to I + n, respectively; hop introns are named as I h , II h , III h , etc., and chl-fus introns are named as I f , II f , III f , etc. Exons coding for TPR and DP domains are color-coded according to conventions (bottom boxes). IGR: intergenic region. Non-syntenic genes are drawn on separate chromosomes