coenzyme A
Definition of coenzyme A
co`en´zyme A`
Pronunciation:
kô`ĕn´zīm ā`
1.
(Biochem.)
a
coenzyme
(
C21H36N7O16P3S
)
that
participates
in
the
transfer
of
acetyl
groups
in
biochemical
reactions
; -
abbreviated
CoA
.
It
contains
adenosine
,
phosphate
,
pantothenic
acid
and
cysteamine
groups
.
The
acetyl
group
to
be
transferred
during
biosynthesis
is
temporarily
attached
to
the
free
sulhydryl
of
the
cysteamine
group
to
form
a
thioester
,
in
which
state
it
is
called
acetyl
coenzyme
A
.
The
strength
of
a
preparation
of
coenzyme
A
may
be
expressed
by
the
Lippman
unit
;
one
milligram
of
CoA
contains
413
Lippman
units
.
Related Words
coenzyme
Word:
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-coenzyme A-
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