\HeaderA{mgug4121aMAP}{Map between Manufacturer Identifiers and cytogenetic maps/bands}{mgug4121aMAP}
\keyword{datasets}{mgug4121aMAP}
\begin{Description}\relax
mgug4121aMAP is an R object that provides mappings between
manufacturer identifiers and cytoband locations.
\end{Description}
\begin{Details}\relax
Each manufacturer identifier is mapped to a vector of cytoband locations. The
vector length may be one or longer, if there are multiple reported
chromosomal locations for a given gene. An \code{NA} is reported for
any manufacturer identifiers that cannot be mapped to a cytoband at this time.

Cytogenetic bands for most higher organisms are labeled p1, p2, p3,
q1, q2, q3 (p and q are the p and q arms), etc., counting from the
centromere out toward the telomeres. At higher resolutions, sub-bands
can be seen within the bands. The sub-bands are also numbered from the
centromere out toward the telomere. Thus, a label of 7q31.2 indicates
that the band is on chromosome 7, q arm, band 3, sub-band 1, and
sub-sub-band 2.   

The physical location of each band on a chromosome can be obtained
from another object named "organism"CYTOLOC in a separate data
package for human(humanCHRLOC), mouse(mouseCHRLOC), and rat(ratCHRLOC).  

Mappings were based on data provided by: Entrez Gene ( ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2008-Apr2
\end{Details}
\begin{References}\relax
\url{http://www.ncbi.nlm.nih.gov}
\end{References}
\begin{Examples}
\begin{ExampleCode}
        x <- mgug4121aMAP
        # Get the probe identifiers that are mapped to any cytoband
        mapped_probes <- mappedkeys(x)
        # Convert to a list
        xx <- as.list(x[mapped_probes])
        if(length(xx) > 0) {
          # Get the MAP for the first five probes
          xx[1:5]
          # Get the first one
          xx[[1]]
        }
\end{ExampleCode}
\end{Examples}

