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RT-PCR using primers 2_4F/SP6 after cotransfection with the BX and SR plasmids. RT-PCR, using primers 2_4F and SP6, on cDNA from HeLa cells cotransfected with the BX plasmid together with a plasmid expressing one of the following proteins: ASF/SF2, SRp20, SRp40, SRp55, 9G8 and hnRNPA1. The transcripts corresponding to each band are drawn on the right.
