[BiO BB] Withdrawl of Refseq accessions

[Michael Muratet US-Huntsville]

Greetings
 
I recently discovered that about 3000 Refseq accessions that were present in the 4/2005 release have been withdrawn. The ones I've looked at appear to be NCBI predictions using their gnomon tool and had 'XM_*' accessions. I'm concerned that a database that is supposed to be stable is so dynamic. I asked NCBI about it, but didn't get an explanation. Does anybody have any experience with such large scale withdrawls? Does anybody know why?
 
Thanks
 
Mike
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