Used in plant biology research to quantify GDP-D-mannose pyrophosphorylase (GMPase) enzyme activity, this ELISA kit enables accurate measurement of GMPase levels in plant tissue samples. The assay is particularly useful in studies related to ascorbic acid (vitamin C) biosynthesis, as GMPase is a key regulatory enzyme in the Smirnoff-Wheeler pathway. Researchers use this kit to investigate how genetic modifications, environmental stresses, or developmental stages affect GMPase expression and, by extension, vitamin C production in plants. It supports high-throughput screening in crop improvement programs aiming to enhance nutritional content or stress tolerance. The kit provides a reliable, sensitive, and specific method for detecting GMPase protein concentration, making it valuable in both academic and agricultural biotechnology research settings.