xlahomologyLL2HGID {xlahomology} | R Documentation

## Mappings between public database identifiers and NCBI's Internal HomoloGeneIDs for Xenopus laevis

### Description

R environments that provides mappings between public database identifiers and internal HomoloGeneIDs (HGID) used by NCBI to represent sequences for Xenopus laevis. Public database identifiers include Entrez Gene identifiers (LL) and GenBank Accesion/RefSeq numbers (ACC).

### Details

Each R environment provides mapping between either HomoloGeneIds and database identifiers. or the converse. The mapping direction is indicated by the name of the environment. For instance, xlahomologyACC2HGID provides mappings between GenBank accession numbers and HomoloGeneIds.

For each environment, a given identifier will map to a named vector of identifiers. the names of which are the NCBI code for that organism.

Mappings contained were based on data provided by HomoloGene.

HomoloGene: ftp://ftp.ncbi.nih.gov/pub/HomoloGene/old/hmlg.ftp. Built: HomoloGene built date not available

Packagebuilt Wed Aug 29 13:36:25 2007

### References

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

### Examples

        require("annotate") || stop("annotate unavailable")
        xx <- as.list(xlahomologyLL2HGID)
            if(length(xx) > 5){
                    # Get the value of the first key
                    xx[2]
                    # Get the value for a few keys
                    if(length(xx) >= 3){
                            xx[2:4]
                    }
            }

[Package xlahomology version 2.0.2 Index]