Quantitative detection of Streptococcus pneumoniae cells harbouring single or multiple copies of the gene encoding the green fluorescent protein.

Abstract excerpt

A modified gfp gene from Aequorea victoria, encoding a variant of the green fluorescent protein (GFP), was subcloned into the mobilizable plasmid pMV158. gfp was placed under the control of the inducible P(M) promoter of the Streptococcus pneumoniae gene malM, cloned in plasmid pLS70. The P(M) promoter is regulated by the product of the pneumococcal malR gene, which is inactivated by growing the cells in...

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