The insertion of Velocigene cassette ZEN-Ub1 created a deletion of size 17212bp between positions 14117971-14135182 of Chromosome 16 (Build GRCm39). This includes part of exon 1, exons 2 to 4, and part of exon 5. Subsequent cre-mediated excision deleted the neomycin selection cassette. (J:308526)