This duplication allele was created through cre-mediated interchromosomal recombination between loxP sites on two alleles: allele Igs46em1Smun containing a single loxP site at chr11:110801622-110801623 (GRCm39), the other allele IIgs44tm1(sb-SBlac)Smun containing an SBlac transposon cassette at chr11:110989101-110989102. It duplicates a mall part of the Kcnj topologically associated domain (TAD) and the Kcnj16 and Kcnj2 genes it contains. (J:235642)