HEK 293 expression of receptors

[Carsten E. Stidsen]

Hi netters:

Recently, I realized that the HEK 293 cell line (ATCC CRL-1573) is 
hypotriploid with approx. 30% triploid cells and 4.2% of higher ploidity. 
When using this cell line for permanent expression of receptors what 
would the likelihood be that you over time will get a cell line with 
another phenotype than the clone you initially picked? Would it be fair 
to compare ligand binding and functional properties of mutant or chimeric 
receptors at different passage # in this cell line?

Please post your ideas, feelings or experiences on this matter to me.
-- 
Carsten E. Stidsen, Ph.D.
Novo Nordisk A/S
Novo Alle 1CS.36
DK-2880 Bagsvaerd
Phone: +45 4442 2578
Fax:     +45 4498 5007