Figure 4 - full size

 

Figure 4.
Fig. 4. Fourier electron density maps showing TrpL163 in 13G5 Fab for UV-irradiated data set H and native control data set I. For a and b, the tryptophan residue was refined as tryptophan, whereas for control (c and d), the tryptophan residue was refined as alanine to avoid model bias. (a) 2F[o] - F[c] maps (blue), contoured at 1.0 .(b) F[o] - F[c] maps, contoured at 3.0 (green) and -3.0 (red). (c)2F[o] - F[c] maps (blue), contoured at 0.8 .(d) F[o] - F[c] maps, contoured at 3.0 (green).