hgu133aREFSEQ {hgu133a} | R Documentation

## Mappings between probe identifiers and RefSeq identifiers

### Description

The Reference Sequence (RefSeq) database contains curated non-redundant set of sequences for genomic DNA, RNA, and protein for various organisms. hgu133aREFSEQ maps probe identifiers to all the RefSeq identifiers that are mapped by NCBI to genes represented by the probe identifiers

### Details

RefSeq ids differ in format according to the type of record the ids are for as shown below:

NG_XXXXX: RefSeq accessions for genomic region (nucleotide) records

NM_XXXXX: RefSeq accessions for mRNA records

NC_XXXXX: RefSeq accessions for chromosome records

NP_XXXXX: RefSeq accessions for protein records

XR_XXXXX: RefSeq accessions for model RNAs that are not associated with protein products

XM_XXXXX: RefSeq accessions for model mRNA records

XP_XXXXX: RefSeq accessions for model protein records

Where XXXXX is a sequence of integers.

NCBI http://www.ncbi.nlm.nih.gov/RefSeq/ allows users to query the RefSeq database using RefSeq ids.

Mappings were based on data provided by:

LocusLink:ftp://ftp.ncbi.nih.gov/refseq/LocusLink/LL_tmpl.gz. Built: January 12, 2005

Package built Wed Jan 12 22:21:54 2005

### References

NCBI http://www.ncbi.nlm.nih.gov and RefSeQ http://www.ncbi.nlm.nih.gov/RefSeq/

### Examples

        # Convert the environment to a list
        xx <- as.list(hgu133aREFSEQ)
        # Remove probe ids that do not map to any RefSeq
        xx <- xx[!is.na(xx)]
        if(length(xx) > 0){
        # The RefSeq for the first two elements of XX
        xx[1:2]
        # Get the first one
        xx[[1]]
    }

[Package hgu133a version 1.7.0 Index]