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Diphosphate(aq)
+
Xanthosine 5'-phosphate(aq)
⇌
5-Phospho-alpha-D-ribose 1-diphosphate(aq)
+
Xanthine(aq)
Reaction Gibbs Energy
Estimated
Δ
r
G'
m
27.5
± 4.8 [kJ/mol]
Estimated
Δ
r
G'°
27.5
± 4.8 [kJ/mol] K'
eq
= 1.5 × 10
-5
Catalyzed by
xanthine phosphoribosyltransferase
[EC 2.4.2.22]
hypoxanthine phosphoribosyltransferase
[EC 2.4.2.8]
pH
pMg
Ionic strength
M
Reactant Abundances
Diphosphate
M
mM
μM
nM
aqueous
5-Phospho-alpha-D-ribose 1-diphosphate
M
mM
μM
nM
aqueous
Xanthine
M
mM
μM
nM
aqueous
Xanthosine 5'-phosphate
M
mM
μM
nM
aqueous
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