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C3
c3
C3 and C4 plants are named after the number of carbon molecules in the first products of their carbon fixation cycles.
C3 plants produce 3-phosphoglycerate and C4 plants produce Oxaloacetate.
Around 50ppm for C3 plants and around 5ppm for C4 plants.
c4 plants have first product of calvin cycle is oxaloacetic acid but in c3 plants is phospfoglyceric acid