\name{xlahomologyLL2HGID}
\alias{xlahomologyLL2HGID}
\alias{xlahomologyACC2HGID}
\alias{xlahomologyHGID2LL}
\alias{xlahomologyHGID2ACC} 
\title{Mappings between public database identifiers and NCBI's Internal
  HomoloGeneIDs for Xenopus laevis}  
\description{
  R environments that provides mappings between public database identifiers and internal
  HomoloGeneIDs (HGID) used by NCBI to represent sequences for
  Xenopus laevis. Public database identifiers include Entrez Gene identifiers (LL) and GenBank
  Accesion/RefSeq numbers (ACC).     
}
\details{
  Each R environment provides mapping between either HomoloGeneIds and
  database identifiers. or the converse. The mapping direction is indicated by
  the name of the environment. For instance, xlahomologyACC2HGID provides
  mappings between GenBank accession numbers and HomoloGeneIds.

  For each environment, a given identifier will map to a named vector of identifiers.
  the names of which are the NCBI code for that organism.
 
  Mappings contained were based on data provided by HomoloGene.
  
  HomoloGene:\\url{ ftp://ftp.ncbi.nih.gov/pub/HomoloGene/old/hmlg.ftp}. Built: HomoloGene built date not available

  Packagebuilt Fri Mar 16 10:03:47 2007
}
\references{
\url{http://www.ncbi.nih.gov/entrez/query.fcgi?db=homologene}
}
\examples{
    require("annotate") || stop("annotate unavailable")
    xx <- as.list(xlahomologyLL2HGID)
        if(length(xx) > 5){
                # Get the value of the first key
                xx[2]
                # Get the value for a few keys
                if(length(xx) >= 3){
                        xx[2:4]
                }
        }
}
\keyword{datasets} 

