Table 1.

Summary of β-galactosidase expression in the transgenic embryos and adult mouse harboring various LacZ constructs that were used for regulatory analysis

Transgenic embryos were scored as positive or negative after overnight incubation with 5-bromo-4-chloro-3-indolyl β-d-galactoside and visual inspection for blue staining. For constructs displaying transgene expression in the skin, internal tissues were scanned for ectopic expression of the reporter gene. Shown are the number of embryos and/or mice that expressed LacZ in the epidermis and the total number of transgenic mice. 

^*Ectopic expression in the bone and cartilage was observed only for one line of the 275X4TKLacZ.