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Leghemoglobin :: metabolism (2354 words) |
 | Leghemoglobins accumulate to millimolar concentrations in the cytoplasm of infected plant cells prior to nitrogen fixation and are thought to buffer free oxygen in the nanomolar range, avoiding inactivation of oxygen-labile nitrogenase while maintaining high oxygen flux for respiration. |
| The conclusion is that the decrease of nitrogen-fixing capacity is caused by a decrease of the leghemoglobin content of the root nodules and not by repression of the nitrogenase synthesis. |
| Characterization of recombinant soybean leghemoglobin a and apolar distal histidine mutants. |
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Leghemoglobin at AllExperts (225 words) |
| The oxygen carrier leghemoglobin (also legoglobin) is a hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. |
| Leghemoglobin has close chemical and structural similarities to hemoglobin, and, like hemoglobin, is red in colour. |
| Leghemoglobin buffers the concentration of free oxygen in the cytoplasm of infected plant cells to ensure the proper function of root nodules. |
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