CAM Photosynthesis
Another “add-on” feature to C3 photosynthesis is crassulacean acid metabolism (CAM).The physiology of this pathway is almost identical to C4 photosynthesis, with the changes that follow:1. PEP carboxylase still fixes CO2 to OAA, as in C4. Instead of malate, however, OAA is converted to malic acid. (This is a minor difference, since malate is merely the ionized form of malic acid). 2. Malic acid
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