[BiO BB] Gene ID mapping

[Kie Kyon Huang]

Hi everybody,

I need a mapping file from Refseq ID/GI number (e.g.
gi|17538053|ref|NP_495443.1|) from several model organisms to their
respective database ID.

I need to find the corresponding ID in WormBase (e.g. WBGene00000001),
FlyBase (e.g. FBgn0043467), Ecoliwiki (e.g.
1-ACYLGLYCEROL-3-P-ACYLTRANSFER-MONOMER)

Can anyone direct me to the respective files? Or do i have to create the
files myself?

Thanks a lot.

Huang kie Kyon