optimize mammalial cloning

[Uwe]

is it possible to optimize a transfected cell-line (by G418-selection) by subcloning, i. e. to 
get a better receptor expession. I think if i got a monoclonal mammalial cell-line which is 
overexpressing a receptor gene, it could improve the expression of this gene, to make a 
subcloning by dilution. I think the cells are dividing over the time and are so not longer be 
monoclonal.