The Flp recombinase (flp deleter), which effectively recombined the Frt sites flanking the neo gene, left behind the loxP sites flanking the exon 2. (J:192520, J:193668)
Legend:
cx: complex: > 1 genome feature ot: other: hemizygous, indeterminate,... (F): Female
(M): Male
N: normal phenotype
(#): related diseases count