Used in biomedical research to quantify levels of human cytochrome P450 2C9 enzyme in biological samples such as liver microsomes or cell lysates. This ELISA kit enables researchers to study enzyme expression and regulation, particularly in drug metabolism studies. It is widely applied in pharmacokinetic research to assess the impact of genetic polymorphisms, drug interactions, and environmental factors on CYP2C9 activity. The assay supports high-throughput screening in drug development for evaluating potential induction or inhibition of CYP2C9, which is critical for predicting metabolic clearance and avoiding adverse drug reactions. Results aid in personalized medicine approaches, especially for drugs with narrow therapeutic windows like warfarin and phenytoin.