Map between Entrez Gene Identifiers and UniGene cluster identifiers

Description

org.Rn.egUNIGENE is an R object that provides mappings between entrez gene identifiers and UniGene identifiers.

Details

Each entrez gene identifier is mapped to a UniGene identifier. An NA is reported if the entrez gene identifier cannot be mapped to UniGene at this time.

A UniGene identifier represents a cluster of sequences of a gene. Using UniGene identifiers one can query the UniGene database for information about the sequences.

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: 2013-Sep12

References

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene

Examples

        x <- org.Rn.egUNIGENE
        # Get the Unigene identifiers that are mapped to an entrez gene id
        mapped_genes <- mappedkeys(x)
        # Convert to a list
        xx <- as.list(x[mapped_genes])
        if(length(xx) > 0) {
          # Get the UNIGENE for the first five genes
          xx[1:5]
          # Get the first one
          xx[[1]]
        }
        # For the reverse map:
        x <- org.Rn.egUNIGENE2EG
        # Get the entrez gene identifiers that are mapped to a Unigene id
        mapped_genes <- mappedkeys(x)
        # Convert to a list
        xx <- as.list(x[mapped_genes])
        if(length(xx) > 0) {
          # Get the entrez gene for the first five genes
          xx[1:5]
          # Get the first one
          xx[[1]]
        }