Differentially expressed orthologous genes exhibiting a conserved expression profile in Xenopus , mouse, and cow. (A) Supervised clustering of expression profiles in the somatic layers of the ovarian follicle in Xenopus, mouse, and cow species during oocyte developmental competence acquisition: developmentally incompetent or poorly competent prophase I oocytes (NC1), developmentally competent prophase I oocytes (C1), and developmentally competent metaphase II oocytes (C2). For each species, the number of differentially expressed orthologous genes is indicated. (B) Gene ontology and KEGG pathways enrichment score. Stars denote the p-values: * p<0.05; ** p<0.01; *** p<0.001.