Transcription factors Sp1 and Sp4 regulate TRPV1 gene expression in rat sensory neurons.

Mol Pain · 2011 · PMC3121596 · PMID 21645329

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showed a trendno p-value reported

Co-transfection of siRNA-Sp4 showed a trend to decreased levels of promoter activity that did not reach significance.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.