Used in plant biology research to quantify pectin methylesterase (PME) enzyme activity in plant tissues. This ELISA kit enables precise measurement of PME levels, which play a key role in cell wall modification during growth, fruit ripening, and plant defense responses. Researchers use it to study plant development, post-harvest quality, and pathogen interactions by analyzing changes in PME expression under different physiological or environmental conditions. The assay is suitable for high-throughput analysis in agricultural and biochemical laboratories.