org.Bt.egCHRLOC {org.Bt.eg.db} | R Documentation |
org.Bt.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.
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 (Bos taurus) ( ftp://hgdownload.cse.ucsc.edu/goldenPath/currentGenomes/Bos_taurus ) on 2008-Apr7
x <- org.Bt.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]] }