hu6800LOCUSID {hu6800}R Documentation

Mappings between probe identifiers and LocusLink identifiers


LocusLink identifiers are unique ids used by NCBI to represent genetic loci and link to curated sequence and descriptive information. hu6800LOCUSID maps probe identifiers to LocusLink identifiers for genes represented by the probe identifiers.


Mappings of probe ids to LocusLink ids are achieved through the linkage between probe ids to manufacturer/user provided ids contained in hu6800ACCNUM. LocusLink ids are first mapped to manufacturer/user provided ids using file(s) provided by Locuslink and in some cases UniGene and other available sources and then linked to probe ids based on the mappings between probe ids and manufacturer/user provided ids.

When a given probe id was mapped to different LocusLink ids by different sources, the one agreed by most sources was selected. When no agreement was achieved among sources, the one of the smallest numeric value was selected.

Mappings were based on data provided by:

LocusLink: Built: September 15, 2004

Package built: Thu Sep 16 11:33:39 2004



    # Convert the environment to a list
    xx <- as.list(hu6800LOCUSID)
    # Remove probe ids that do not map to any LOCUSID
    xx <- xx[!]
    if(length(xx) > 0){
        # The LOCUSIDs for the first two elements of XX
        # Get the first one

[Package hu6800 version 1.6.5 Index]