The oxygen sensor MgFnr controls magnetite biomineralization by regulation of denitrification in Magnetospirillum gryphiswaldense

Table 3 Rates of N₂O and N₂ emission in WT and ΔMgfnr mutant after nitrate addition and rates of O₂ consumption during aerobic respiration

Culture (2% oxygen)	N₂O emission	N₂emission	O₂consumption
Culture (2% oxygen)	(μM/min^a)	(μM/min)	(μM/min)
WT without nitrate	ND^b	ND	50.7 ± 10.0
ΔMgfnr mutant without nitrate	ND	ND	44.0 ± 2.0
WT with nitrate	14.1 ± 2.0	0.7 ± 0.5	41.3 ± 2.0
ΔMgfnr mutant with nitrate	12.0 ± 2.0	0.4 ± 0.2	44.0 ± 4.7

^aThe values (in μM per min for a cell suspension of OD_{565 nm} of 1) are the average of eight independent experiments. ^bND: not detectable.

ISSN: 1471-2180