👉 Calvin fluid, also known as the Calvin cycle intermediates or ribulose-1,5-bisphosphate (RuBP) acceptors, refers to the key molecules involved in the light-independent reactions of photosynthesis, specifically within the Calvin cycle. These intermediates include various forms of ribulose-1,5-bisphosphate (RuBP) and other small organic molecules like 3-phosphoglycerate (3-PGA), glyceraldehyde-3-phosphate (G3P), and ribulose-5-phosphate (Ru5P). During the cycle, CO2 is fixed into RuBP through a series of enzymatic reactions, and these intermediates are crucial for the regeneration of RuBP and the synthesis of glucose and other organic compounds. The Calvin cycle operates in the stroma of chloroplasts, converting inorganic carbon into organic molecules that sustain plant growth and energy production.
