[BioC] chrome coordinates are not same between Ensembl and Affy's annotation file

[shirley zhang]

Dear List,

I have been trying to draw the genome graphs for some genes in human.
I found that the coordinates of some genes are not close between
Ensembl and Affy's annotation (Affymetrix Human Exon array). For
example, gene SFRS1:

SFRS1 (ENSG00000136450):     Chromosome 17: 56,078,284-56,084,707
reverse strand  (Ensemble 55)

SFRS1Transcript Cluster ID: 3764103  Human Exon 1.0 ST):
chr17:53421412-53439635 (-)

Can anybody tell me what happens?

Thanks,
Shirley