Used for the detection and quantification of plant FK (fumarase kinase or related enzyme) activity in biological samples such as plant tissue extracts. This ELISA kit enables researchers to measure enzyme levels accurately in studies related to plant metabolism, stress response, and photosynthetic efficiency. It is widely applied in agricultural research, plant physiology, and genetic engineering to evaluate metabolic pathway regulation and enzyme function under various environmental or genetic conditions. The assay provides high sensitivity and specificity, making it suitable for high-throughput screening in plant biotechnology and crop improvement programs.