Figure 2.

Genome structure of swine enteric coronaviruses (SeCoVs). The genomic structures of the four known SeCoVs are shown in the schematic diagram above (not to scale). The 5′-cap structure and 3′ polyadenylation are 5′-C and AnAOH-3′, respectively. Following the open reading frame ORF1ab (marked in red) are genes encoding structural and accessory proteins. Structural proteins (S, E, M, and N) are marked in blue and accessory proteins are marked in gray.