> > What evidence is there that genes whose products
> > function together, and are unrelated in sequence, are co-localized in the
> > genome -- a la operonic genes in prok's?
Some may, and some may not. For instance the Urea-cycle enzymes (or
for the purists the ornithine cycle enzymes) are divided over
differnt chromosomes in mammals. So here's one example that crushes
L. van de Zande