Fig. 4From: Characterization of accessory genes in coronavirus genomesa Schematic view of genome organization of ORF3a, ORF3b and E gene. b Multiple alignment of ORF3a, ORF3b sequences, with X motifs in the reading frame of ORF3a shown in blue. The start and stop codons of the overlapping ORF3b sequences (in the + 1 reading frame of ORF3a) are indicated by purple and red boxes respectively. X motifs in the reading frame of ORF3b are shown in greenBack to article page