Extended Data Figure 5: Uracil content patterns for human and swine IAV internal genes.
From: A synchronized global sweep of the internal genes of modern avian influenza virus
a–f, Human PB2 (a), PB1 (b), PA (c), NP (d), M1/2 (e) and NS1/2 (f). g–l, Swine PB2 (g), PB1 (h), PA (i), NP (j), M1/2 (k) and NS1/2 (l). After nearly a century of steadily increasing U content in each of these mammalian hosts, these genes still show considerably lower U content than the corresponding equine H7N7 genes.
