在第3外显子前476个碱基对的位置插入了一个基因捕获载体,这个载体位于内含子2中,是第一个编码外显子。插入导致β-半乳糖苷酶基因的剪接异常,并丢失下游的mRNA。 (Source: The insertion creates an abnormal splicing event in the beta-galactosidase gene, leading to loss of downstream mRNA due to the gene-trapping cassette inserted 476 bases upstream of exon 3.)
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A gene-trapping cassette inserted into intron 2, 476 base pairs upstream of exon 3, which is the first coding exon. The insertion results in aberrant splicing to the beta-galactosidase gene and loss of downstream mRNA.