Clip2^tm1.1Gal

ES cells containing Cyln2tm1Gal were electroporated with a construct containing cre recombinase and a hygromycin resistance gene. Expression of cre resulted in the excision of the floxed region containing both previously inserted selection genes and exons 3 through 17. Neither normal transcript nor normal protein was detected in homozygous mutant mice by Northern and Western blot analyses. Recombination left the previously inserted lacZ gene in frame with the endogenous promoter, which drove its expression. (J:78711)