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NifT/FixU protein This family consists of several NifT/FixU bacterial proteins. NifT/FixU is a very small, conserved protein that is found in nif clusters; however, its function is unknown. Although it is thought that the protein may be involved in biosynthesis of the FeMo cofactor of nitrogenase although perturbation of nifT expression in K. pneumoniae has only a limited effect on nitrogen fixation.
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