Teichoic
Acid -
Teichoic
acids
are
also
substituted
polysaccharides
containing
ribitol
or
glycerol
residues
joined
through
diphosphoester
linkages
.
These
are
generally
found
in
the
Gram-positive
bacteria
in
association
with
the
peptidoglycan.
They
constitute
a
major
surface
antigen.
Teichoic
acids
are
found
in
the
cell
walls
(wall
teichoic
acids),
in
the
membranes
(membrane
teichoic
acids)
and
as
the
extracellular
teichoic
acids.
Both
the
membrane
and
wall
teichoic
acids
are
found
attached
to
alanyl
residues.
Two
types
of
teichoic
acids
known
are
glycerol
and
ribitol
teichoic
acids
The
biosynthesis
of
glycerol
teichoic
acid
in
Bacillus
licheniformis
involves
first
the
activation
of
L-α-glycerophosphate
by
CTP.
The
activated
precursor,
CDP
glycerol,
is
then
added
to
the
preexisting
polymer.
