Maria Yu. Senashova

Institute of computational modelling of the SB RAS

The spatial distribution of GC-content values of chloroplast and mitochondrial genome fragments is considered. Spatial distribution refers to the distribution of points corresponding to genome regions in the frequency space of triplets. It was found that the values of the GC-content of fragments for most genomes are distributed not chaotically, but in an orderly manner. Two main types of distribution were found: gradient and centrally symmetric. In chloroplast genomes, only a gradient distribution occurs. In mitochondria genomes, both types of distribution occur. The type of distribution for mitochondria genomes depends on the type of organism. The spatial distribution of the GC-content is stable with respect to changes in the reading window length.

order, spatial distribution, triplets, frequency dictionaries, principal components