The key enzymatic reactions in nitrogen fixation are catalyzed by the nitrogenase complex, which has 2 components: the iron protein and the molybdenum-iron protein. NIFH Protein, Rhizobium leguminosarum, Recombinant (GST & His & Myc) is expressed in E. coli expression system with N-10xHis-GST and C-Myc tag. The predicted molecular weight is 35.0 kDa and the accession number is P20623.