@article{betancourt_loveless_brown_bishop_2008, title={Characterization of diazotrophs containing Mo-independent nitrogenases, isolated from diverse natural environments}, volume={74}, ISSN={["1098-5336"]}, DOI={10.1128/AEM.02694-07}, abstractNote={ABSTRACT}, number={11}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Betancourt, Doris A. and Loveless, Telisa M. and Brown, James W. and Bishop, Paul E.}, year={2008}, month={Jun}, pages={3471–3480} }
 @article{qurollo_bishop_hassan_2001, title={Characterization of the iron superoxide dismutase gene of <i>Azotobacter vinelandii</i>: <i>sodB</i> may be essential for viability}, volume={47}, ISSN={1480-3275 0008-4166}, url={http://dx.doi.org/10.1139/cjm-47-1-63}, DOI={10.1139/cjm-47-1-63}, number={1}, journal={Canadian Journal of Microbiology}, publisher={Canadian Science Publishing}, author={Qurollo, Barbara A. and Bishop, Paul E. and Hassan, Hosni M.}, year={2001}, pages={63–71} }
 @article{loveless_bishop_1999, title={Identification of genes unique to Mo-independent nitrogenase systems in diverse diazotrophs}, volume={45}, ISSN={["1480-3275"]}, DOI={10.1139/w99-007}, abstractNote={A number of nitrogen-fixing bacteria were screened using PCR for genes (vnfG and anfG) unique to the V-containing nitrogenase (vnf) and the Fe-only nitrogenase (anf) systems. Products with sequences similar to that of vnfG were obtained from Azotobacter paspali and Azotobacter salinestris genomic DNAs, and products with sequences similar to that of anfG were obtained from Azomonas macrocytogenes, Rhodospirillum rubrum, and Azotobacter paspali DNAs. Phylogenetic analysis of the deduced amino acid sequences of anfG and vnfG genes shows that each gene product forms a distinct cluster. Furthermore, amplification of an internal 839-bp region in anfD and vnfD yielded a product similar to anfD from Heliobacterium gestii and a product similar to vnfD from Azotobacter paspali and Azotobacter salinestris. Phylogenetic analysis of NifD, VnfD, and AnfD amino acid sequences indicates that AnfD and VnfD sequences are more closely related to each other than either is to NifD. The results of this study suggest that Azotobacter salinestris possesses the potential to express the vanadium (V)-containing nitrogenase (nitrogenase 2) and that R. rubrum, Azomonas macrocytogenes, and H. gestii possess the potential to express the Fe-only nitrogenase (nitrogenase 3). Like Azotobacter vinelandii, Azotobacter paspali appears to have the potential to express both the V-containing nitrogenase and the Fe-only nitrogenase.Key words: Mo-independent nitrogenase systems, diverse diazotrophs, vnfG, anfG.}, number={4}, journal={CANADIAN JOURNAL OF MICROBIOLOGY}, author={Loveless, TM and Bishop, PE}, year={1999}, month={Apr}, pages={312–317} }
 @article{loveless_saah_bishop_1999, title={Isolation of nitrogen-fixing bacteria containing molybdenum-independent nitrogenases from natural environments}, volume={65}, number={9}, journal={Applied and Environmental Microbiology}, author={Loveless, T. M. and Saah, J. R. and Bishop, P. E.}, year={1999}, pages={4223–4226} }
 @article{premakumar_pau_mitchenall_easo_bishop_1998, title={Regulation of the transcriptional activators AnfA and VnfA by metals and ammonium in Azotobacter vinelandii}, volume={164}, DOI={10.1111/j.1574-6968.1998.tb13068.x}, abstractNote={Transcription of the genes encoding molybdenum (Mo)-independent nitrogenases 2 and 3 of Azotobacter vinelandii requires the activators VnfA and AnfA, respectively. The effect of NH4+, Mo, or V (vanadium) was tested on the expression of vnfA-lacZ and anfA-lacZ transcriptional fusions. Mo repressed expression of both fusions whereas NH4+ and V repressed the anfA-lacZ fusion, but not the vnfA-lacZ fusion. Thus the repressive effect on transcription of the anfHDGKOR operon by NH4+, Mo, or V is mediated through their effect on transcription of anfA and the repressive effect of Mo on the vnfHFd and vnfDGK operons is mediated through Mo repression of vnfA transcription. Mo-dependent repression of anfA transcription is influenced but not entirely mediated by the Mo-responsive regulator ModE.}, number={1}, journal={FEMS Microbiology Letters}, author={Premakumar, R. and Pau, R. N. and Mitchenall, L. A. and Easo, M. and Bishop, P. E.}, year={1998}, pages={63–68} }
 @article{bishop_jarlenski_hetherington_1982, title={Expression of an alternative nitrogen fixation system in Azotobacter vinelandii}, volume={150}, number={3}, journal={Journal of Bacteriology}, author={Bishop, P. E. and Jarlenski, D. M. L. and Hetherington, D. R.}, year={1982}, pages={1244} }