\name{org.Gg.egCHRLOC} \alias{org.Gg.egCHRLOC} \alias{org.Gg.egCHRLOCEND} \title{Entrez Gene IDs to Chromosomal Location} \description{ org.Gg.egCHRLOC is an R object that maps entrez gene identifiers to the starting position of the gene. The position of a gene is measured as the number of base pairs. The CHRLOCEND mapping is the same as the CHRLOC mapping except that it specifies the ending base of a gene instead of the start. } \details{ Each entrez gene identifier maps to a named vector of chromosomal locations, where the name indicates the chromosome. Chromosomal locations on both the sense and antisense strands are measured as the number of base pairs from the p (5' end of the sense strand) to q (3' end of the sense strand) arms. Chromosomal locations on the antisense strand have a leading "-" sign (e. g. -1234567). Since some genes have multiple start sites, this field can map to multiple locations. Mappings were based on data provided by: UCSC Genome Bioinformatics (Gallus gallus) ftp://hgdownload.cse.ucsc.edu/goldenPath/galGal3 With a date stamp from the source of: 2009-Jul5 } \examples{ x <- org.Gg.egCHRLOC # Get the entrez gene identifiers that are mapped to chromosome locations mapped_genes <- mappedkeys(x) # Convert to a list xx <- as.list(x[mapped_genes]) if(length(xx) > 0) { # Get the CHRLOC for the first five genes xx[1:5] # Get the first one xx[[1]] } } \keyword{datasets}