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KEGG pathway classification of unigenes. (a) NAA; (b) NAS. The KEGG pathways were categorized into five groups, A: Cellular process, B: Environmental information processing, C: Genetic information processing, D: Metabolism and E: Organismal system. KEGG: Kyoto Encyclopedia of Genes and Genomes; NAS: the East Asian finless porpoise; NAA: the Yangtze finless porpoise.
