A TI{CRIMIC.TG4.1} DNA cassette has been inserted into tzn, in a coding intron, and is predicted to gene trap a subset of the annotated transcripts of the gene. In addition, the coding exons of tzn 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 tzn : one targeted to a coding intron (GAACAAAAAGCGTAGATACTGGG) and the other to a non-coding exon in the 3' UTR (AACTTTCGAGGAAATAGATCAGG).