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Fig. 2 | Microbial Cell Factories

Fig. 2

From: Development of a new gene expression vector for Thermus thermophilus using a silica-inducible promoter

Fig. 2

Induction of the sip promoter with different concentrations of silicic acid. A 5% suspension of pre-culture was inoculated in freshly prepared TM medium containing silicic acid and cultivated for 24 h. The β-galactosidase activity levels in culture are given in Miller units (MU). White bar: HB27 with pSix1 (empty vector), black bar: HB27 with βgal/pSix1. Values are expressed as means ± standard deviations (n = 3)

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Microbial Cell Factories

ISSN: 1475-2859

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