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CO
2
(total)
?
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CO2(aq)
+
Diphosphate(aq)
+
Nicotinate D-ribonucleotide(aq)
⇌
5-Phospho-alpha-D-ribose 1-diphosphate(aq)
+
Quinolinate(aq)
Reaction Gibbs Energy
Estimated
Δ
r
G'
m
43.1
± 8.4 [kJ/mol]
Estimated
Δ
r
G'°
25.9
± 8.4 [kJ/mol] K'
eq
= 2.8 × 10
-5
Catalyzed by
nicotinate-nucleotide diphosphorylase (carboxylating)
[EC 2.4.2.19]
pH
pMg
Ionic strength
M
Reactant Abundances
CO2
M
mM
μM
nM
aqueous
gas
Diphosphate
M
mM
μM
nM
aqueous
5-Phospho-alpha-D-ribose 1-diphosphate
M
mM
μM
nM
aqueous
Nicotinate D-ribonucleotide
M
mM
μM
nM
aqueous
Quinolinate
M
mM
μM
nM
aqueous
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