A loxP site4 was introduced upstream and a frt site-flanked neomycin resistance cassette followed by a second loxP site downstream of exon 4. Cre recombinase excision of the floxed DNA segment would result in a reading frame shift leading to a premature termination codon. (J:188481)
Legend:
cx: complex: > 1 genome feature ot: other: hemizygous, indeterminate,... (F): Female
(M): Male
N: normal phenotype
(#): related diseases count