Used in epigenetic research to quantify histone methyltransferase G9α activity in rat samples. Helps assess changes in H3K9me2 levels, a marker of gene silencing, in studies related to chromatin regulation, transcriptional control, and cellular differentiation. Commonly applied in neuroscience, cancer research, and toxicology to evaluate epigenetic modifications under experimental conditions. Enables high-throughput screening of inhibitors or activators targeting G9α in drug development. Provides a reliable, sensitive method for monitoring enzyme activity in cell lysates or tissue extracts without requiring radioactivity.