Figure 6.

Translocation of an alanine polypeptide through the ribosome's exit tunnel and into the channel. In all panels, the ribosome is shown as cyan space-filling spheres and SecYEβ is shown as in Figure 1. The translocating polypeptide, Ala₂₆, is shown in green. The system is shown at (A) t=0 ns, with only the tip of Ala₂₆ visible outside the ribosome, (B) t=3 ns, (C) t=6 ns, and (D) t=9 ns. The full translocation process is shown in Movie S5 in Supplemental Data.