\HeaderA{drosophila2REFSEQ}{Map between Manufacturer Identifiers and RefSeq Identifiers}{drosophila2REFSEQ}
\keyword{datasets}{drosophila2REFSEQ}
\begin{Description}\relax
drosophila2REFSEQ is an R environment that provides mappings between
manufacturer identifiers and RefSeq identifiers.
\end{Description}
\begin{Details}\relax
Each manufacturer identifier is mapped to a named vector of RefSeq identifiers. The
name represents the manufacturer identifier and the vector contains all RefSeq
identifiers that can be mapped to that manufacturer identifier. The length of the
vector may be one or greater, depending on how many RefSeq identifiers a given
manufacturer identifier can be mapped to. An \code{NA} is reported for any
manufacturer identifier that cannot be mapped to a RefSeq identifier at this time.

RefSeq identifiers differ in format according to the type of record the identifiers
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 identifiers.

Mappings were based on data provided by:

Entrez Gene:\bsl{}url{ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/}. Built: Source data downloaded from Entrez Gene on Thu Mar 15 17:54:57 2007

Package built Thu Mar 15 18:00:58 2007
\end{Details}
\begin{References}\relax
\url{http://www.ncbi.nlm.nih.gov}
\url{http://www.ncbi.nlm.nih.gov/RefSeq/}
\end{References}
\begin{Examples}
\begin{ExampleCode}
    # Convert the environment to a list
    xx <- as.list(drosophila2REFSEQ)
    # Remove probe identifiers 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}

