A TI{CRIMIC.TG4.1} DNA cassette has been inserted into Ir75a, in a coding intron, and is predicted to gene trap all annotated transcripts of the gene. In addition, the coding exons of Ir75a downstream of the inserted gene trap cassette have been deleted. The TI{CRIMIC.TG4.1} cassette was inserted via the CRISPR/Cas-9 hybrid technique, using two gRNAs that target Ir75a : one targeted to a coding intron (AAGTTCTAGCTATTTCTTAGTGG) and the other to a non-coding exon in the 3' UTR (ACTATATTCTATTTGCACCCAGG).