Hi there,
The last updated annotation is at affymetrix website and download it.
Hope it works for you.
Kachelo

2010/12/20 <arne.mueller@novartis.com>

> Hello,
>
> I was wondering where the mapping from affy probeset Ids to genes
> (EntrezGene) is coming from (package mouse4302.db).
> mouse4302.db::mouse4302_dbInfo lists all data sources (URLs) However,
> what's the "original" link between an affy probeset and an EnterzGene Id,
> is it Netaffx? My problem is that I've an "interesting" probeset that is
> annotated with an EntrezGene in Netaffx but the mouse4302SYMBOL map
> contains NA for this probeset Id.
>
> I'd be happy if someone could point me to some documentation how this
> annotation/mapping is derived or let me know what I'm doing wrong ...?
>
>   thanks a lot for your help,
>
>   arne
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