An illustration of the length variations of 20 putative protein coding sequence groups encoded by eight influenza a virus genomic strand RNAs.

<p>The y-axis indicates the length of the putative protein coding sequences. AIAV, HIAV and MIAV indicate influenza A viruses from avian, human and mammalian hosts, respectively. One-way ANOVA was performed and p values were used to indicate the differences between the putative protein coding sequence lengths among influenza A viruses from different hosts.