NifL gene product

X, N, Ep and H are needed for synthesis of FeMo-co and for its incorporation into the MoFe-protein.55/55a Nif A is an activator gene for the whole duster including the nifL gene product, which is altered by the presence of 02 or of glutamine. Accumulation of the latter in cells (see Section B,2) strongly represses transcription of the nitrogenase genes. 

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