\HeaderA{hgu2beta7REFSEQ}{Mappings between probe identifiers and RefSeq identifiers}{hgu2beta7REFSEQ}
\keyword{datasets}{hgu2beta7REFSEQ}
\begin{Description}\relax
The Reference Sequence (RefSeq) database contains curated
non-redundant set of sequences for genomic DNA, RNA, and protein 
for various organisms. hgu2beta7REFSEQ maps probe identifiers to all
the RefSeq identifiers that are mapped by NCBI to genes represented by
the probe identifiers
\end{Description}
\begin{Details}\relax
RefSeq ids differ in format according to the type of record the ids
are for as shown below:

NG\_XXXXX: RefSeq accessions for genomic region (nucleotide) records

NM\_XXXXX: RefSeq accessions for mRNA records

NC\_XXXXX: RefSeq accessions for chromosome records

NP\_XXXXX: RefSeq accessions for protein records

XR\_XXXXX: RefSeq accessions for model RNAs that are not associated with
protein products

XM\_XXXXX: RefSeq accessions for model mRNA records

XP\_XXXXX: RefSeq accessions for model protein records

Where XXXXX is a sequence of integers.

NCBI \url{http://www.ncbi.nlm.nih.gov/RefSeq/} allows users to query
the RefSeq database using RefSeq ids.

Mappings were based on data provided by:

LocusLink:\url{ftp://ftp.ncbi.nih.gov/refseq/LocusLink/LL_tmpl.gz}. Built: February 16, 2005

Package built Wed Feb 16 23:32:20 2005
\end{Details}
\begin{References}\relax
NCBI \url{http://www.ncbi.nlm.nih.gov} and RefSeQ 
\url{http://www.ncbi.nlm.nih.gov/RefSeq/}
\end{References}
\begin{Examples}
\begin{ExampleCode}
    # Convert the environment to a list
    xx <- as.list(hgu2beta7REFSEQ)
    # Remove probe ids that do not map to any RefSeq
    xx <- xx[!is.na(xx)]
    if(length(xx) > 0){
    # The RefSeq for the first two elements of XX
    xx[1:2]
    # Get the first one
    xx[[1]]
}
\end{ExampleCode}
\end{Examples}

