The will first appear in three-carbon
compounds.
The Calvin cycle is the light-independent
reaction of photosynthesis that occurs in the stroma of chloroplasts. The key
initial step of the Calvin cycle is the fixation of carbon dioxide (CO2)
by the enzyme. In this step, CO2 combines with C5 to form
two molecules of C3.
When a green plant is placed in an
atmosphere containing , this labeled carbon dioxide will
participate in the Calvin cycle. As