Which enzyme is the most abundant protein on Earth and catalyzes the carboxylation of RuBP?
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Correct answer: RuBisCO enzyme
Ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCO) is the enzyme responsible for CO2 fixation in the Calvin cycle. It is characterized by its dual ability to bind both CO2 and O2 and is the most abundant protein in the biosphere.
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