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Goblet cell–specific expression of β-galactosidase by ITF promoter in transgenic mice. Transgenic mice were produced by injection of a construct composed of 6.35 kb of 5′ end of mITF ligated to β-galactosidase. Tissues were fixed and stained using Lac-Z to locate expression of β-galactosidase, as detailed in Methods. Counterstaining was done with eosin Y. (a) Small intestine. (b) Colon.
