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Differential splicing at the 5′ end of the mRNAs in tumor-derived cells. (A) Schematic of the promoter and exons of the 5′ end of the BART mRNA with the genomic coordinates noted. (B) RT-PCR analysis using primers specific for P1 and exon 3. The splicing structures of the products are denoted from sequencing the gel-purified bands.
