Growth on galactose

[BURKE PATRICIA]

On 22 Feb 1996, Mark Crowe wrote:

> In article <1996Feb20.153439.4723 at nedcu0>, David Humair <David
> humair at bota. unine.ch> wrote:
> 
> > Hello yeast's people,
> > My question is perhaps stupid but I have no answer!
> > Is it normal that my yeasts grow more slowly on galactose than on glucose?
> > Glucose: 24-48 hours
> > Galactose: 48-96 hours, and the colonies are smaller
> 
> I've had yeast do the same, although I don't use galactose often, so I
> can't say whether this is common. Also the strain I was using was
> slow-growing on glucose anyway, but still took even longer on galactose -
> this may have affected the relative growth rates on the two media.
> 
> -- 
> Mark Crowe - mark.crowe at bbsrc.ac.uk
> Institute of Food Research
> Earley Gate, Whiteknights Road, Reading, UK
> 
> 
Ulery et al MGG 230: 129-135 1991 found that imp1 is allelic to GAL2 with 
gal permease activity slightly higher than the gal2 mutants. S288c is 
imp1 so many lab strains may carry undocumented imp1.
Pat Burke
burkep at spot.Colorado.EDU