What is proteose peptone (Difco)?

Stefan Schneider s.schneider at rz.uni-sb.de
Thu Mar 7 08:59:56 EST 1996

In article <4hkoco$s0i at milo.mcs.anl.gov>, mark_fuller at qmgate.anl.gov 
>Can someone tell me what proteose peptone is?  

You're not in need of a DIFCO manual, as there are other providers of it. 
Proteose peptone is a special mixture of proteolytically digested peptones 
 containing a very high amount of high molecular weight peptides (MW 
partly > 4000 D). It is used in the Elek-Ouchterlony test for the 
identification of toxine producing Corynebacterium diphteriae strains and 
for the toxine detection in cultures of Staphyllococcus ssp., Clostridium 
ssp. and Salmonella ssp.
In addition, bacteria with varying need for nutritions can be grown on 
media prepared with proteose peptone (e. g. Neisseria ssp., 
Corynebacterium ssp. and Histoplasma). I wouldn't consider it a good idea 
to substitue by some other peptone

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