org.Dm.egCHRLOC {org.Dm.eg.db} | R Documentation |
org.Dm.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.
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 (Drosophila Melanogaster) ( ftp://hgdownload.cse.ucsc.edu/goldenPath/currentGenomes/Drosophila_melanogaster ) on 2007-Jul11
x <- org.Dm.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]] }