\HeaderA{mapping2exon}{This function maps on exon-level Probe Selection Region (PSR) starting for the file produced by function 
oneChannelGUI: Mapping exon level probe sets to Reference Sequences}{mapping2exon}
\keyword{manip}{mapping2exon}
\begin{Description}\relax
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.
\end{Description}
\begin{Usage}
\begin{verbatim}
mapping2exon()
\end{verbatim}
\end{Usage}
\begin{Author}\relax
Raffaele A Calogero
\end{Author}

