Imprecise excision of the P{EP}Trx-2EP2018 element, removing the Trx-2 promoter and the entire gcm2 open reading frame. 2894bp have been deleted and replaced with 9 unrelated nucleotides. The deletion starts at +736 and ends at +3629 relative to the 5' end of the gcm2 cDNA. The deletion results in a fusion of the remaining Trx-2 sequences with the gcm2 promoter, such that a low level of expression of Trx-2 is detected in the pattern normally associated with gcm2.