Figure 2.

Schematic of the IAV coding strategy. mRNAs from the eight segments are symbolized by horizontal black lines. Coding regions (only approximately to scale) are represented by boxes with colors defining different reading frames (dark blue: primary products, frame 1; light blue: secondary products, frame 1; magenta: secondary products, frame 2). mRNA splicing in segments 1, 7, and 8 is denoted by deflected lines connecting coding regions.