the difference between tryptone and peptone

[Ricky]

In article <DSgN7.44$t4.1707 at news.uchicago.edu>,
 "Emir Khatipov" <khatipovNO at NOuchicago.edu> wrote:

> If I remember correctly, both are produced by digesting by-products of meat
> industry. The difference is in the way the digestion is carried out. As the
> names of products indicate, Tryptone is a tryptic digest (i.e. with
> trypsin), whereas Peptone is a product of peptic digest (i.e. with crude
> digestive jouces - I might be mistaken here, but it probably does not matter
> much). In general, I would substitute one for another, because their
> composition is very similar. Check with the manufacturer on the typical


Perhaps for LB. yes.

But I would do that willy-nilly for all organisms. Some are quite picky, 
and there is enough of a difference between peptone and tryptone that 
one will not support the growth of certain microbes over the other.

-r