comparison of these spectra to those of hemoglobin , methemoglobin , cytochrome c , and model cobalt porphyrin complexes suggests that the displacement of the cobalt atom upon oxygenation of cohb is no greater than the out-of-plane distance in five-coordinate co ( ii ) porphyrins , 0.15 a .
C0019046
hemoglobin
C0025635
methemoglobin