What is the first step of the Calvin-Benson cycle?
It refers to the initial incorporation of
- Calvin cycle begins by the reaction of
#CO_2#with highly reactive phosphorylated five carbon-sugar named ribulose bisphosphate(RuBP).
- This reaction is catalyzed by the enzyme ribulose bisphosphate carboxylase also known as Rubisco.
- The product of this reaction is highly unstable six-carbon intermediate that immediately breaks into two molecules of three-carbon-compound named
- The carbon that was originally a part of
#CO_2#molecule is now a part of an organic compound which means carbon has been fixed.
Rubisco is the most abundant protein in the chloroplast and probably the most abundant protein on Earth.