org.Hs.egENSEMBL {org.Hs.eg.db} | R Documentation |
org.Hs.egENSEMBL is an R object that contains mappings between Entrez Gene identifiers and Ensemble gene accession numbers.
This object is a simple mapping of Entrez Gene identifiers http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene to Ensembl gene Accession Numbers.
Mappings were based on data provided by: Entrez Gene ( ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2008-Apr2
x <- org.Hs.egENSEMBL # Get the entrez gene IDs that are mapped to an Ensembl ID mapped_genes <- mappedkeys(x) # Convert to a list xx <- as.list(x[mapped_genes]) if(length(xx) > 0) { # Get the Ensembl gene IDs for the first five genes xx[1:5] # Get the first one xx[[1]] } #For the reverse map ENSEMBL2EG: # Convert to a list xx <- as.list(org.Hs.egENSEMBL2EG) if(length(xx) > 0){ # Gets the entrez gene IDs for the first five Ensembl IDs xx[1:5] # Get the first one xx[[1]] }