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  • R8000 - D-Ribulose 1,5-Diphosphate Carboxylase from spinach

R8000 Sigma-Aldrich

D-Ribulose 1,5-Diphosphate Carboxylase from spinach

partially purified powder, 0.01-0.1 unit/mg solid

Synonym: 3-Phospho-D-glycerate carboxy-lyase(dimerizing), Rubisco



General description

Exists as a 557 kDa hexadecamer composed of eight heavy chains each with a molecular weight of approximately 56 kDa and eight light chains of molecular weight 14 kDa. Each molecule contains one magnesium ion.
pH optimum: ~7.9.
KM for CO2: ~0.45 mM.
Ribulose diphosphate becomes inhibitory at concentrations exceeding 0.7 mM. Orthophosphate and ammonium sulfate are competitive inhibitors. 3-Phosphoglycerate is a noncompetitive inhibitor.


D-Ribulose 1,5-diphosphate carboxylase from spinach has been used in a study to assess catalytic by-product formation and ligand binding by ribulose bisphosphate carboxylases from different phylogenies. D-Ribulose 1,5-diphosphate carboxylase from spinach has also been used in a study to determine RuBisCO activation kinetics and other rate and equilibrium constants by simultaneous multiple non-linear regression of a kinetic model.


1 unit in poly bottle

5 units in poly bottle

Unit Definition

One unit will convert 1.0 μmole of D-RuDP and CO2 to 2.0 μmoles of D-3-phosphoglycerate per min at pH 7.8 at 25°C.

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles

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