Gene ontology categories and KEGG pathways of stably expressed genes by automatic GO analysis of Molecule Annotation System (MAS2.0). A: Gene ontology categories for stably expressed genes. Genes were classified into cellular component, molecular function, and biological process. Prunosus arrow heads indicate the predominant molecular functions among the stably expressed genes. B: KEGG pathways for stably expressed genes. Those pathways which involve more than four genes were selected for mapping and were listed according to the number of genes.