TA cloning and competent cells
seemysignature at mole.bio.cam.ac.-uk
Tue Jan 14 08:38:58 EST 1997
In article <Pine.A184.108.40.2060113183839.20104H-100000 at aix1.uottawa.ca>,
sunfish <s535290 at aix1.uottawa.ca> wrote:
>does anyone ever use homemade competent cells for use with TA cloning ?
>(we use the pCR2.1 by invitrogen) Sometimes we run out of the competent
>cells that come with the kit and if I'm in a hurry and can't wait for new
>cells to arrive, it'd be nice to know that the home made stuff is alright.
>If anyone does use their own competent cells, what strain do you use, and
>what method do you use for making the cells competent ?
>thanks in advance,
You can afford to _buy_ competent cells routinely???!
The Inoue method of chemical competent cells is excellent and works with
every strain that I've tried - OK, so thats only XL1-blue and DH5alpha.
Why don't you streak out some of the cells that come with the kit, and use
them? Make a glycerol stock while you are at it, so that next time you need
them you have a nice stock of the _original_ isolate.
I think the Inoue reference is in the FAQ. Its in Gene, 1990 I think - I
can check if you can't find it.
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