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. 2001 Nov;69(11):6707–6717. doi: 10.1128/IAI.69.11.6707-6717.2001

TABLE 3.

β-Galactosidase activities of Y. pestis strains containing lacZ reporters

Straina β-Galactosidase activity (mean ± SE Miller units)a
−Fe/+Fe ratio
+Fe −Fe
KIM6(pEU730)+ 118 ± 14 203 ± 71 1.7
KIM6(pEUHas)+ 8,264 ± 1,532 39,738 ± 6,182 4.8
KIM6(pEU730) 227 ± 49 285 ± 26 1.3
KIM6(pEUHas) 5,822 ± 1,208 19,023 ± 6,597 3.3
KIM6-2030(pEU730) 200 ± 46 446 ± 62 2.2
KIM6-2030(pEUHas) 22,152 ± 4,492 28,674 ± 5,235 1.3
a

Bacterial cells were grown in deferrated PMH2 at 37°C and harvested during mid-log-phase growth. Whole-cell lysates were assayed for β-galactosidase activity as described in reference 28