A fast and sensitive alternative for β-galactosidase detection in mouse embryos

S Sundararajan, M Wakamiya, RR Behringer… - …, 2012 - journals.biologists.com
S Sundararajan, M Wakamiya, RR Behringer, JA Rivera-Pérez
Development, 2012journals.biologists.com
The bacterial lacZ gene is widely used as a reporter in a myriad of mouse transgenic
experiments. β-Galactosidase, encoded by lacZ, is usually detected using X-gal in
combination with ferric and ferrous ions. This assay produces a blue indole precipitate that is
easy to detect visually. Here, we show that Salmon-gal in combination with tetrazolium salts
provides a more sensitive and faster staining reaction than the traditional β-galactosidase
assay in mouse embryos. Using a combination of Salmon-gal and tetranitroblue tetrazolium …
The bacterial lacZ gene is widely used as a reporter in a myriad of mouse transgenic experiments. β-Galactosidase, encoded by lacZ, is usually detected using X-gal in combination with ferric and ferrous ions. This assay produces a blue indole precipitate that is easy to detect visually. Here, we show that Salmon-gal in combination with tetrazolium salts provides a more sensitive and faster staining reaction than the traditional β-galactosidase assay in mouse embryos. Using a combination of Salmon-gal and tetranitroblue tetrazolium, we were able to visualize the activity of β-galactosidase in embryos at stages when the customary X-gal reaction failed to detect staining. Our studies provide an enhanced alternative for β-galactosidase detection in expression and cell fate studies that use lacZ-based transgenic mouse lines.
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