Table 1.

Additions to DTSB affect growth and the production of β-galactosidase from a toxA-lacZ fusion

Supplement(s)A600 at 14 hMean β-galactosidase activity (U/mg of protein) ± SD
None1.161,144 ± 75
Glutamate4.661,376 ± 38
Glutamate + FeSO4 7.15328 ± 6
Citrate3.39643 ± 15
Isocitrate3.91451 ± 2
Malate1.961,625 ± 21
Succinate0.941,292 ± 69