Used for the quantitative measurement of glutamine synthetase (GS) enzyme activity in plant tissue samples. This kit is widely applied in plant physiology and molecular biology research to study nitrogen metabolism. It helps assess how plants assimilate ammonia, which is critical for understanding plant growth, stress responses, and fertilizer efficiency. Researchers use it in studies related to crop improvement, environmental stress tolerance, and genetic modification. The assay enables high-throughput analysis, making it suitable for screening plant varieties with enhanced nitrogen use efficiency.