One loxP site was placed upstream of exon 1 while an FRT/loxP flanked neomycin cassette was inserted in intron 2. Correctly targeted mice were mated with flp recombinase expressing mice to excise the neo selection cassette leaving exons 1 and 2 flanked by loxP sites. The flp expressing transgene was then bred away. (J:190168)
Legend:
cx: complex: > 1 genome feature ot: other: hemizygous, indeterminate,... (F): Female
(M): Male
N: normal phenotype
(#): related diseases count