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. Author manuscript; available in PMC: 2010 Mar 5.
Published in final edited form as: Q Rev Biophys. 2009 Aug;42(3):159–200. doi: 10.1017/S0033583509990060

Fig. 9.

Fig. 9

Ratchet motion of the E. coli ribosome observed with binding of EF-G. (a) Normal (MSI) conformation; (b) Conformation (MSII) after ratchet-like rotation of the 30S subunit, with EF-G (red) bound. Labels and landmarks: sp (spur), L1 (L1 stalk). This figure was altered for the purposes of this article. Data adapted from Valle et al. (2003b), copyright (2003) Cell Press.