TABLE 3.
Effect of multicopy genes on K+ uptake in strain TK2420
| Strain | Gene on plasmid | K+ uptakea at external K+ concn (mM) of:
|
|
|---|---|---|---|
| 5 | 40 | ||
| TK2420 | 2.5 ± 0.3b (n = 7) | ||
| TK2420(pJD101) | Control | 2.6 | |
| TK2420(pEBGC11) | proP | 0.7 | 6.4 |
| TK2420(pEBGC13) | proP | 0.9 | 6.8 |
| TK2420(pEBGC30) | trkG | 6.3 | |
| TK2420(pJD301) | trkH | 4.2 | |
a
Initial rate of K+ uptake with glucose as growth and transport substrate, in micromoles per gram (dry weight) per minute. No entry means that measurement was not done.
b
For the parental strain, TK2420, data are the mean ± standard deviation.