A loxP site was inserted upstream of the 5' silencer region and a floxed neo cassette was inserted immediately downstream. Transient cre expression removed the selection cassette from properly targeted ES cells leaving the silencer region flanked by loxP sites. (J:195348)
Legend:
cx: complex: > 1 genome feature ot: other: hemizygous, indeterminate,... (F): Female
(M): Male
N: normal phenotype
(#): related diseases count