Figure 13 - full size

 

Figure 13.
FIG. 13. Sections of the electron density distribution in the pane of the heme group. The plane of section. is the least-squares plane given by equation (22) and the view is from the distal histidine side. The porphyrn skeleton, without propioni acid side chains, is superimpose on the density distribution.

The above figure is reprinted by permission from Elsevier: J Mol Biol (1973, 74, 331-361) copyright 1973.