Strains | K_{s} for Nitrite Transport Activity^{a} (μM) | NiR Activity (mU/mg Chl)^{b} |
---|---|---|
JA4 (Nar1^{–}) | ND^{c} | 1163±381 (n = 3) |
AU3 (Nar1^{+}) | 4.8±3.8 (n = 3) | 778±29 (n = 3) |
WT (Nar1^{+}) | 5.5±1.6 (n = 3) | 579±37 (n = 3) |
PAD41 (Nar1^{–}) | ND | 857±182 (n = 3) |
AD7 (Nar1^{+}) | 8±4 (n = 3) | 715±122 (n = 3) |
D2 (Nar1^{–})^{d} | 7 | 956 |
AD3 (Nar1^{+})^{d} | 3 | 842 |
↵^{a} K_{s} was determined from the progress curves (Galván et al., 1996). Statistical values represent the mean ±sd from three independent experiments.
↵^{b} mU, nmol nitrite hr^{–1}; Chl, chlorophyll.
↵^{c} ND, not determinable under our experimental conditions.
↵^{d} Data for strains D2 and AD3 correspond to a representative experiment from two independent ones.