Fig. 2.

Molecular interactions in the mito-SSU body. Environments of (A) NTE (red) of MRP S5 and (B) NTEs and CTEs of MRPs S15 (green) and S17 (sea green). Here and in subsequent figures, NTEs and CTEs of MRPs are indicated by the suffix “n” or “c”, respectively, in matching colors. “h” followed by a number indicates the 12 rRNA helix. As in Fig. 1 C and D, docked models of mito-specific MRPs are shown along with their cryo-EM densities (meshwork), and undocked densities are shown as solid masses in this and subsequent figures. Thumbnails to the left in this and subsequent figures show the overall orientations of the mito-SSU.