St3gal2^tm2Jxm

A targeting vector was used to place a floxed neomycin-thymidine kinase expression cassette downstream of the exon containing the large sialyl motif and a loxP site upstream of the exon. Correctly targeted ES cells were transfected with a Cre expression plasmid to excise the neo fragment, leaving the floxed exon. (J:80119)