Used to measure the activity of key enzymes involved in the carbon fixation pathway in plants, particularly those related to C4 photosynthesis such as phosphoenolpyruvate carboxylase (PEPC), pyruvate orthophosphate dikinase (PPDK), and NADP-malic enzyme. This kit enables researchers to quantify enzyme levels in plant tissues, helping assess photosynthetic efficiency and carbon concentrating mechanism (CCM) performance under various environmental conditions such as drought, high temperature, or salinity. It is widely applied in plant physiology studies, crop improvement programs, and genetic engineering projects aimed at enhancing photosynthetic capacity in C3 plants by introducing C4 traits. The assay supports high-throughput analysis, making it suitable for screening transgenic lines or natural variants for improved carbon assimilation.