external starch

Rick Bortnick rblgw at linknet.net
Tue Dec 2 18:34:04 EST 1997


Pittman wrote:
> 
> How can you determine if Saccharomyces cerevisiae, E. Coli k-12, or
> Bacillus subtilis can utilize external starch?
> 
> Thanks in advance!

Grow the organisms on 10% starch agar for a week.  Then flood the plate
with an iodine solution.  If you see a clear halo around the colonies,
they can use the starch.

Rick Bortnick
Delaware Valley College



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