\name{homologHOMOLOG}
\alias{homologHOMOLOG}
\alias{homologHOMOLOG2GENEID}
\title{Tax identifier}
\description{
  homologHOMOLOG map Entrez gene identifier to homolog group identifier.
}
\details{
  Mappings were based on data provided by:HomoloGene (\url{ftp://ftp.ncbi.nlm.nih.gov/pub/HomoloGene/current/homologene.data}) on
  2 0 0 
}

\examples{
     ## Convert to a list
     xx <- as.list(homologHOMOLOG)     
     if(length(xx) > 0){
         xx[1:5]
     }
     
     ## For the reverse map homologHOMOLOG2GENEID
     ## Convert to a list
     xx <- as.list(homologHOMOLOG2GENEID)     
     if(length(xx) > 0){
         xx[1:5]
     }     
}