Also RuBisCo ( ribulose-1 , 5-biphosphate carboxylase oxygenase ) . This is what biochemicals call a fundamental enzyme in photosynthesis processes because it catalyzes the fixation of carbon and oxygen from carbon dioxide (CO2) in plant cells. Plants and phytoplankton are estimated to transform more than 200. 000 million tons of carbon dioxide per year.
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