Fig. 6

Nitrite utilization and transport rate in relation to the concentration of the added nitrite. Dots – the rate of nitrite consumption by the cell, calculated based on the experimental data from [7]; curve 1 – the rate of nitrite utilization by the periplasmic NrfA reductase; curve 2 – the rate of nitrite import into the cell by the NirC transporter; curve 3 – the rate of nitrite export from the cell by the NirC transporter, measured in negative units; curve 4 – the rate of nitrite utilization by the cytoplasmic NirB reductase; curve 5 – the total rate of nitrite utilization by NrfA and NirB reductases. Calculations performed with the (1) model version, in which K _М,NirC,out  = 0.003 mМ, k _s,NirC, 0 = 0.00011 mM/s; other parameter values are from the Appendix: Table 1