Multiple Forms OfPlant Phosphoenolpyruvate Carboxylase

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We covered the topic of photosynthesis with  reasonable depth in the biochemistry series,   and we’ve mentioned it quite a bit in  this botany series as well. Given that   this series focuses largely on the diversity  of plants, we need to revisit photosynthesis   for a moment. But this time we are not going to  focus quite as much on the general mechanism.   Instead, we must outline the major differences  between the three different metabolic pathways   that lead to carbon fixation in angiosperms. If  this term is unfamiliar, carbon fixation refers to   the process by which carbon dioxide is converted  into more biologically useful organic compounds   within living organisms. Again, we already  have a general understanding of this process,   but there are some key differences between certain  groups of plants that must now be elucidated.  In most plants, initial fixation of carbon occurs  when the enzyme rubisco adds CO2 to RuBP. These   plants are known