Hello I'm using the biomaRt package in R to map RefSeq mRNA ids to Ensemble 
Gene Ids.
The code I'm using and an example of the results are as follows:

> mart=useMart("ensembl", dataset="mmusculus_gene_ensembl")
> getBM(attributes=c("refseq_mrna", "ensembl_gene_id"),
+                 filters="refseq_mrna",
+                 values="NM_175666",
+                 mart=mart,
+                 uniqueRows=T)
  refseq_mrna    ensembl_gene_id
1   NM_175666 ENSMUSG00000058385
2   NM_175666 ENSMUSG00000047246
3   NM_175666 ENSMUSG00000018102
> 

The result for the biomart web interface (and the ensembl site itself) is:
NM_175666 ENSMUSG00000050936

The Ensembl Gene Id above doesn't show up in the results from biomaRt.

Are there any thoughts about what might be happening?

Thank you,
Tyler Funnell



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