To define a gene expression mechanism, it is often advantageous to use a reporter gene and transgenic mouse. The lacZ reporter gene is particularly useful for studies of the cis-regulatory element for tissue-specific expression in transgenic mice because of the ease of the enzyme assay and visualization on sections. In this report, we describe our method for examining the cis-regulatory element in transgenic mice, including choice of the lacZ gene, generation of transgenic mice, and analysis of β-galactosidase activity. Themes: Cellular and molecular biology. Topics: Staining, tracing, and imaging techniques. Copyright (C) 2000 Elsevier Science B.V.
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