Figure 4

Stereoscopic Drawing of Metmyoglobin⁹

Skeleton. The heme is shown in red. (a) Only the a -carbons are shown in conjunction with the side chain of HIS 8F and the heme. Note the large empty space at the bottom of the heme. (b) Viewed along the b axis. Note that the helices A and D have no direct contact with the heme.