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. 2012 Feb 27;7(2):e29527. doi: 10.1371/journal.pone.0029527

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The enhancer with NAGS promoter (4.10PromEnh) increases transcription relative to the promoter in liver derived cells but not in intestine or lung derived cells (cyan bars) without the addition of HNF-1 protein (teal bars). Calculated results are an average of three independent experiments that were carried out in triplicate, normalized to Rluc expression, and expressed relative to the promoter for each experiment with error reported as ±SEM. Lowercase letters indicate statistically significant differences.