Fig. 2.

Gene classification diagram. a GO classification diagram. b KOG classification diagram. c KEGG classification diagram. The ordinate is the name of the KEGG metabolic pathway, and the abscissa is the ratio of the number of genes annotated to the pathway and the total number of genes annotated. Genes are divided into five branches based on KEGG metabolic pathways (A, cellular processes; B, environmental information processing; C, genetic information processing; D, metabolism; E, organismal systems)