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Rescuing orphaned refs ("Becana" → "phytoglobin" from Phytoglobin) |
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</ref> Leghemoglobin maintains a free oxygen concentration that is low enough to allow nitrogenase to function, but a high enough total oxygen concentration (free and bound to leghemoglobin) for aerobic respiration.
Leghemoglobin falls into the class of '''symbiotic globins''', which also include the root nodules globins of [[actinorhizal plant]]s such as ''[[Casuarina]]''. The ''Casuarina'' symbiotic globin is intermediate between leghemoglobin and nonsymbiotic phytoglobin-2.<ref name="
== Structure ==
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