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Figure 5.
Figure 5. (a) Ribbon view of the Vitreoscilla Hb homodimer
observed in the crystallographic asymmetric unit. In this
(nearly symmetric) assembly the heme iron atoms are located
about 34 Å apart. (b) Ribbon view of the crystal packing
contacts affecting the heme distal and proximal regions of the A
subunit cyan, taken as reference molecule from the asymmetric
unit of Vitreoscilla Hb homodimer. The contact shown occurs with
an equivalent molecule from the crystalline lattice (yellow),
related to the subunit by a screw axis and by translations along
a and c unit cell edges.
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