Figure 2.
Fig. 2. Experimental electron density maps. (A) An F[o]
F[o]
electron density map (blue net) contoured at 4.0 shows
density corresponding to CCA-pcb (green) in the P site and
sparsomycin (yellow). Additional density corresponds to altered
conformations of nucleotides such as A2637 (orange). (B) F[o]
F[o]
electron density map of CCA-pcb shows that in the absence of
sparsomycin, the P site substrate is bound equally between the P
site (green) and the A site (red).
F[o]
electron density map (blue net) contoured at 4.0 
shows
density corresponding to CCA-pcb (green) in the P site and
sparsomycin (yellow). Additional density corresponds to altered
conformations of nucleotides such as A2637 (orange). (B) F[o]