higher rate of common coexpression edges. For example, among the 7784 coexpression edges in the Dme platform, 1112 edges also appear in the Dme2 platform, but only 70 edges appear in the Hsa platform. When we focus on the platforms for different species, the number of commonly observed edges seems to reflect the species phylogeny. This phenomenon is the result of the number of homologous genes, as well as the diversity of the transcriptome. The ratio of the edges commonly observed in the other platform reached 28% in the human Hsa2 platform, whereas just 6% of the total edges in the Cel platform (nematode) and Gga platform (chicken) are reproduced in the other platforms. Although the absolute ratios of common edges vary among the platforms, the ratios of each platform have steadily increased through this improved version of the database.
