This function retrieve from RRE the PSR sequences associated to the exon-level probe sets and all exons associated to the gene associated to PRS. Subsequently identify the exon where PSR maps and procuces a fasta file were are located exon-level PSR and target exon. The mapping is done using the countPattern function of the Biostrings package. Up to three mismathces are allowed in PSR mapping on exonic sequence.
Raffaele A Calogero
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