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Genome organization of swine enteric coronaviruses TGEV, PEDV, and PDCoV. Genes for structural proteins are presented in yellow. Putative accessory genes are shown in green. Nonstructural proteins encoded by ORF1a/b are presented in blue. TGEV, transmissible gastroenteritis coronavirus; PEDV, porcine epidemic diarrhea virus; PDCoV, porcine deltacoronavirus; S, spike; E, envelope; M, membrane; N, nucleocapsid. Genomes have 5′ cap and 3′ poly A tail.
