On Wed, 19 Mar 2003, jennifer wrote:
> If i overexpress some protein, in the cell population, some cells may have a
> lot of that protein, some may have less. Can I use western to distinguish
> between them?
> Or is there any method to measure a specific protein's concentration in a
> single bacterial cell?
>> BTW, does anbody know that whether using IPTG as an inducer will cause a
> problem like that?
>
Can you please help me understand why you want to differentiate between
individual cells? Recombinant cultures that respond to IPTG usually
involve a T7lac operon -- is this your system?
As long as you use antibiotics to guard against wild-type overgrowth, and
pay attention to good methodology (i.e. like picking a fresh colony to
grow up), then IPTG induction will result in all recombinant cells
responding in sync.
Jim
