Skip to main content
. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Future Virol. 2015 Jun;10(6):715–730. doi: 10.2217/fvl.15.31

Figure 1. Influenza A virus genome organization and flexibility.

Figure 1

The eight influenza A virus segments are represented in 3′ to 5′ negative sense. Regions of flexibility are determined (white boxes) by areas inside ORFs that do not have cis-acting RNA elements (packaging signals and splice sites) or alternative overlapping ORFs. Noncoding regions are indicated in black boxes. Packaging signals are indicated in gray boxes. In frame (pink) and out of frame (red) overlapping ORFs are also indicated. Red circle indicates ribosomal slippage sequence.

ORF: Open reading frame.