rubisco
Noun
Meaning
rubisco (plural rubiscos)
(biochemistry) A plant enzyme (ribulose-1,5-bisphosphate carboxylase oxygenase) which catalyzes both the fixing of atmospheric carbon dioxide during photosynthesis and the reverse process of photorespiration. [from 20th c.]
RuBisCO
Alternative form of rubisco
Examples
Carbon fixation and G3P synthesis The Calvin cycle starts by using the enzyme Rubisco to fix CO 2 into five-carbon Ribulose bisphosphate (RuBP) molecules.
Bundle sheath chloroplasts do not carry out the light reactions, preventing oxygen from building up in them and disrupting rubisco activity.
Their energy is used in the light-independent reactions of the Calvin cycle by the enzyme rubisco to produce molecules of the 3-carbon sugar glyceraldehyde 3-phosphate (G3P).
Rubisco is the enzyme that fixes CO 2 into sugar molecules.