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. Author manuscript; available in PMC: 2014 Jul 15.
Published in final edited form as: Nature. 2014 Feb 16;508(7495):254–257. doi: 10.1038/nature13016

Extended Data Figure 5. Uracil content patterns for human and swine IVA internal genes.

Extended Data Figure 5

a-f, respectively: human PB2, PB1, PA, NP, M1/2, NS1/2. g-l, respectively: swine PB2, PB1, PA, NP, M1/2, NS1/2. After nearly a century of steadily increasing U content in each of these mammalian hosts, these genes still exhibit considerably lower U content than the corresponding equine H7N7 genes.