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β-Galactosidase activities in extracts of R. sphaeroides following oxygen shift
| Strain | β-Galactosidase activitya (avg ± SD [n = 3])
|
|
|---|---|---|
| 0 h after shift | 4–6 h after shift | |
| 2.4.1(pCF200) | 110 ± 38 | 515 ± 52 |
| JZ1678(pCF200) | 145 ± 43 | 350 ± 34 |
| 2.4.1(pCF250) | 110 ± 24 | 386 ± 40 |
| JZ1678(pCF250) | 56 ± 19 | 108 ± 32 |
Expressed in units, defined as micromoles of o-nitrophenyl-β-d-galactopyranoside hydrolyzed per minute per milligram of protein extract.
