Used for the quantitative measurement of rat haptoglobin-like (HL) activity in biological samples such as serum, plasma, or tissue homogenates. This ELISA kit is commonly applied in research settings to assess inflammation, acute phase responses, and immune modulation in rat models. It is particularly useful in studies related to infection, tissue injury, and autoimmune diseases where HL activity serves as a biomarker. The assay enables high-throughput analysis with high sensitivity and specificity, supporting pharmacological and toxicological evaluations in preclinical research.