\name{u133x3pSYMBOL}
\alias{u133x3pSYMBOL}
\title{Map between Manufacturer Identifiers and Gene Symbols}
\description{
  u133x3pSYMBOL is an R object that provides mappings between
  manufacturer identifiers and gene abbreviations. 
}
\details{
  Each manufacturer identifier is mapped to an abbreviation for the
  corresponding gene. An \code{NA} is reported if there is no known
  abbreviation for a given gene.
  
  Symbols typically consist of 3 letters that define either a single
  gene (ABC) or multiple genes (ABC1, ABC2, ABC3). Gene symbols can be
  used as key words to query public databases such as Entrez Gene.
  
  Mappings were based on data provided by: Entrez Gene  
  ftp://ftp.ncbi.nlm.nih.gov/gene/DATA  
  With a date stamp from the source of: 2014-Sep19
  
}
\references{
  \url{http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene}
}
\examples{
        x <- u133x3pSYMBOL
        # Get the probe identifiers that are mapped to a gene symbol
        mapped_probes <- mappedkeys(x)
        # Convert to a list
        xx <- as.list(x[mapped_probes])
        if(length(xx) > 0) {
          # Get the SYMBOL for the first five probes
          xx[1:5]
          # Get the first one
          xx[[1]]
        }
}

\keyword{datasets}

