Hi,

I'm looking for some advice as to how to cross reference 3 lists of genes
that I am researching.

I have these lists in a single workbook, with each list in its own
worksheet. The lists start in Cell A1 and vary in size from 337 genes in the
smaller list and upto 1489 genes in the largest.

Basically, each list refers to the genes of interest in a particular region.
I'm therefore looking for a way to cross reference these lists to show which
genes appear in all three regions.

Hope someone can help!

Thanks

Mark