Red/White yeast

SLForsburg susan_forsburg at
Fri Apr 21 17:18:40 EST 1995

C.Grant at unsw.EDU.AU (Chris Grant) wrote:
>         I have been working with a yeast strain which is red due to an ade2
> mutation. My question is, why does this strain now go white when I
> introduce a mutation which makes it into a petite? Any help would be
> greatly appreciated.

This is as it should be.  I was always told that formation 
or accumulation of the red pigment requires that the cells be
respiratory competent.  It's a useful way to verify your ade2 strain 
hasnt thrown off petites, if nothing else.

susan_forsburg at

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