Alternative splicing of the platelet-derived growth factor A-chain transcript occurs in normal as well as tumor cells and is conserved among mammalian species.

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Abstract
Using a polymerase chain reaction approach, we have analyzed the alternative usage of the platelet-derived growth factor A-chain exon 6 in mRNA from various cell types. The results show that this sequence is utilized in a small fraction of the mRNA molecules in normal as well as transformed cells and that this phenomenon is conserved among mammalian species.