\name{IlluminaHumanMethylation450kMETHYL27}
\alias{IlluminaHumanMethylation450kMETHYL27}
\title{Determine whether a probe is also found on the 27k chip}
\description{
 IlluminaHumanMethylation450kMETHYL27 is a mapping to a boolean column in the
 annotation database that indicates whether a 450k probe was on the 27k chips.
}
\details{
  Value is a simple TRUE or FALSE for each probe.
  Note: the 27k probes on the 450k chips do not all retain 27k probe chemistry!
  
  Mappings were based on data provided by: Illumina
  http://Illumina.com
  Downloaded 19-Sep-2009
  
}

\examples{
        x <- IlluminaHumanMethylation450kMETHYL27
        xx <- as.list(x)
        if(length(xx) > 0) {
          # Get the values for the first five probes
          xx[1:5]
        }
}
\keyword{datasets}