[Bioperl-l] convert Refseq ID to another ID can be used for Gene ontology?

[Frank Lee]

Dear All,

I met a  trouble question for using gene ontology.   I have finished my 
protein analysis by using data from Refseq database.  But when I wish to 
further analyze the protein function with GO, I unfortunately found that 
refseq ID are not supported:-(.    Can anybody have the experience on 
convert refseq ID to another IDs which can be used in GO?  

My protein sequence cover Homo, Mus,  Arabidopsis, Oryza, Drosophila, C. 
elegans.   It seems IDs used for GO is different for different species.  
Anyway, I should try one by one.  Thanks in advance.

Best wishes

Frank