RT-PCR analysis of wild-type and chimeric transcripts. RNA samples were reverse transcribed and then amplified with 5′ and 3′ PDGFRβ primers (PDGFRβ), 5′ and 3′ CEV14 primers (CEV14), 5′ CEV14 and 3′ PDGFRβ primers (CEV14-PDGFRβ), or 5′ PDGFRβ and 3′ CEV14 primers (PDGFRβ-CEV14). PCR products were electrophoresed on 2% agarose gels and stained with ethidium bromide.