\name{org.Ce.egSYMBOL} \alias{org.Ce.egSYMBOL} \alias{org.Ce.egSYMBOL2EG} \title{Map between Entrez Gene Identifiers and Gene Symbols} \description{ org.Ce.egSYMBOL is an R object that provides mappings between entrez gene identifiers and gene abbreviations. } \details{ Each entrez gene identifier is mapped to the a common 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: 2012-Mar7 } \references{ \url{http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene} } \examples{ x <- org.Ce.egSYMBOL # Get the gene symbol that are mapped to an entrez gene identifiers mapped_genes <- mappedkeys(x) # Convert to a list xx <- as.list(x[mapped_genes]) if(length(xx) > 0) { # Get the SYMBOL for the first five genes xx[1:5] # Get the first one xx[[1]] } # For the reverse map: x <- org.Ce.egSYMBOL2EG # Get the entrez gene identifiers that are mapped to a gene symbol mapped_genes <- mappedkeys(x) # Convert to a list xx <- as.list(x[mapped_genes]) if(length(xx) > 0) { # Get the entrez gene ID for the first five genes xx[1:5] # Get the first one xx[[1]] } } \keyword{datasets}