An FRT-flanked selection vector containing a neomycin resistance gene and a single 5' loxP site was inserted upstream of exon 2 of the Mgl2 gene and a second loxP site was inserted downstream of exon 10 of the Clec10a gene. The selection cassette and exons 2 through 10 of Mgl2 and all of the Clec10a gene were subsequently removed from properly targeted mice by crossing to transgenic mice carrying Tg(EIIa-cre)C5379Lmgd. (J:94077)