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The oligomeric state and kinetics of ligand binding were measured for wild‐type cytoglobin. Cytoglobin has the classical globin fold, with an extension at each extremity of about 20 residues. The extended length of cytoglobin leads to an ambiguous interpretation of its oligomeric state. Although the hydrodynamic diameter corresponds to that of a dimer, it displays a mass of a single subunit, indicating...
The normally hexa coordinate ferrous form of neuroglobin binds CO by replacement of the heme-linked distal histidine residue. We have studied this reaction in detail using stopped flow techniques. The reaction time courses are complex at all the wavelengths studied. Specifically the reaction with CO occurs in two temporally separable phases, each of which shows a hyperbolic dependence of rate on CO...
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