Transport
of
Non-PTS
System - Organisms like E. coli and Styphimurium contain the PTS, but can also take up sugars such as lactose which apparently do not involve the PTS.
Whether
a
sugar
is
a
PTS
sugar
or
a
non
PTS
sugar
depends
on
the
organism.
In S. aureus and E. coli glucose, fructose and mannose are PTS sugars. In S. aureus all sugars except maltose and perhaps glycerol are PTS sugars.
Lactose
is
a
PTS
sugar
in
S.
aureus
but
is
a
non
PTS
sugar
in
E.
coli
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