Used to measure the activity of human thrombopoietin (TPO) in biological samples such as serum, plasma, or cell culture supernatants. This ELISA kit enables researchers to quantify TPO levels accurately, supporting studies in hematopoiesis, platelet production, and bone marrow function. It is widely applied in clinical research to investigate thrombocytopenia, myeloproliferative disorders, and autoimmune diseases. The assay is also useful in drug development for monitoring TPO receptor agonist effects and evaluating therapeutic responses. High sensitivity and specificity allow detection of low TPO concentrations, making it suitable for both research and diagnostic laboratory settings.