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. Author manuscript; available in PMC: 2012 Oct 31.
Published in final edited form as: Microbiology (Reading). 2008 Sep;154(Pt 9):2689–2699. doi: 10.1099/mic.0.2008/019406-0

Table 6. Nitrogenase activity in R. rubrum ΔglnB mutants with NifA variants when grown in MG (nitrogen-limiting) medium.

Strain nifA integrated into ΔglnB mutant (UR717) Nitrogenase activity*
UR2 Wild-type 800
UR1739 Wild-type nifA integrated into ΔglnB mutant <10
UR1740 nifA11 (encoding NifA-M173I) integrated into ΔglnB mutant 470
UR1741 nifA12 (encoding NifA-M173V) integrated into ΔglnB mutant 450
UR11742 nifA23 (encoding NifA-M173L) integrated into ΔglnB mutant 450
UR11743 nifA24 (encoding NifA-L184R) integrated into ΔglnB mutant 400
UR11744 nifA25 (encoding NifA-A243T) integrated into ΔglnB mutant 500
UR11745 nifA26 (encoding NifA-G36E) integrated into ΔglnB mutant 220
UR11746 nifA27 (encoding NifA-T38P) integrated into ΔglnB mutant 310
*

Units of nitrogenase activity are expressed as in Table 2.