Model for pre-40S subunits with assembly factor binding sites as adapted from [26].

The proposed locations of ribosome assembly factors are shown in the same color scheme as in Figure 6, with Enp1 in pink, Ltv1 in yellow, Rio2 in purple, Dim1 in orange, Nob1 in green, Tsr1 in blue and Pno1 in red. Rps3, Rps5, Rps14 and Rps15 are highlighted in blue. Enp1 and Ltv1 are proposed to bind on the back site. Thus, on the subunit interface they are shown as transparent (A), and on the solvent side as opaque (B). Nob1 is proposed to bind on the side and thus seen in full color on both views. All other proteins are proposed to bind on the subunit interface and are thus shown in full color on the front and in transparent on the solvent side view.