LacZ/Immunohistochemistry

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Caty784
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LacZ/Immunohistochemistry

Hi!
Please, can anyone explain the mechanism whereby the reporter gene, lacZ, is used in staining a piece of tissue for subsequent visualization of the product of the gene it is connected to? (I know that in the blue/white screening, it cleaves beta-gal and produces blue color, but how about in tissue itself???)
Thank you so much.
Cat