Extended Data Figure 3: Surface views of the FluA heterotrimer with bound vRNA promoter.
From: Structure of influenza A polymerase bound to the viral RNA promoter

a–d, Four surface views at roughly 0° (a), 180° (b), 110° (c) and 290° (d) rotations with PA, PB1 and PB2 uniformly green, cyan and red, respectively. Major subdomains are labelled. The vRNA 5′ and 3′ ends are pink and yellow, respectively.