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R.J. Davenport rjd23 at CUS.CAM.AC.UK
Fri Mar 8 06:18:34 EST 1996

On 7 Mar 1996 LEIBOWITZ at ocelot.rutgers.edu wrote:

> As I already emailed Rich, I have had no problem mating yeasts in liquid,
> although I have not done so 96 wells at a time.  Perhaps the source of the
> problem you describe might be that as assayed on plates, etc., alpha cells
> produce much more mating factor activity than do a cells, i.e., it is easy to
> demonstrate a shmooing in response to alpha cells but harder to demonstrate
> alpha shmooing in response to a cells.  I don't know if this difference (seen
> obviously in wild-type cells, since mutants can be made to do anything)
> reflects differences in amount of mating factor produced or mating factor
> specific activity differences.  I'm curious, do you find you need more a's than
> alpha's, as my explanation would imply?
> Sincerely,
> Mike Leibowitz
> UMDNJ-RW Johnson Medical School
thanks for your reply. My experiment requires that all my a cells mate; 
therefore i have been using an excess of alphas. 
my a strain has different nutritional requirements from my alpha strain, 
so when i plate out my culture all the haploid alphas die and hopefully 
all that survive are diploids. alas, i seem to still get a lot of haploid 
a cells. 

Romola Davenport
Dept of Plant Sciences
Downing St Cambridge
(01223) 330 210 (lab)
(01223) 311 408 (home)

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