Used in biomedical research to quantify levels of human thymidine synthase (TS) in cell lysates, tissue extracts, or biological fluids. This ELISA kit enables researchers to study TS expression in cancer cells, particularly in tumors such as colorectal, gastric, and breast cancer, where TS levels correlate with response to chemotherapy drugs like 5-fluorouracil (5-FU). It supports investigation into drug resistance mechanisms and helps assess the effectiveness of antifolate treatments. The assay is also applied in monitoring disease progression and evaluating therapeutic interventions in oncology and molecular biology studies.