Abstract

The human reduced folate carrier gene was found to contain 7 exons, including two alternative non-coding exons (exons 1 and 2), spanning ∼29 kb. Two transcript variants involving exon 7 were detected in K562 cells by RT-PCR, distinguishable from the wild-type transcript by deletions of 625 bp (KS32) and 988 bp (KS1). The presence of consensus splice donor and acceptor elements in the deleted KS1 isoform suggested that this form was likely a splice variant; however, KS32 likely arose during reverse transcription rather than by alternative splicing.

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