Table 5.

Ni transporter expression at constant [Ni²⁺]^a

Comparison	Fold change
	SYNW1628	SYNW0635	hupE
pNi 12.3 vs pNi 10.3	0.80 ± 0.1	1.33 ± 0.05	0.62 ± 0.1
pNi 11.3 vs pNi 10.3	0.86 ± 0.08	1.10 ± 0.03	0.63 ± 0.07

^aThe ratios or fold changes of Ni uptake rates at 5 nM total Ni and the expression of the indicated genes were determined for semicontinuous cultures grown on NH₄⁺ at the indicated [Ni²⁺] where pNi = −log₁₀[Ni²⁺]. The values are shown as the ratios of the measured rates and gene transcript abundance for the indicated cultures. Ranges for triplicate Q-PCR measurements on duplicate cultures are shown.