R. D. Joerger Joerger, R. D., Wolfinger, E. D., & Bishop, P. E. (1991). The gene encoding dinitrogenase reductase 2 is required for expression of the second alternative nitrogenase from Azotobacter vinelandii. Journal of Bacteriology, 173(14), 4440. JOERGER, R. D., LOVELESS, T. M., PAU, R. N., MITCHENALL, L. A., SIMON, B. H., & BISHOP, P. E. (1990). NUCLEOTIDE-SEQUENCES AND MUTATIONAL ANALYSIS OF THE STRUCTURAL GENES FOR NITROGENASE-2 OF AZOTOBACTER-VINELANDII. JOURNAL OF BACTERIOLOGY, 172(6), 3400–3408. https://doi.org/10.1128/jb.172.6.3400-3408.1990