Figure 3 - full size

Figure 3.
Figure 3. Illustration of the two possibilities of inserting the heme into the protein moiety assessed by high resolution X-ray crystallography: A: electron density maps: 3F[o]-2F[c] map contoured at 1 (blue) and F[o]-F[c] map contoured at -2.5 (red) and +2.5 (green), B: the corresponding two orientations of the heme.