Used in biomedical research to quantify histidine decarboxylase (HDC) enzyme levels in biological samples such as cell lysates, tissue homogenates, and serum. This kit enables researchers to study the regulation of histamine synthesis, as HDC is the key enzyme responsible for converting histidine to histamine. It is widely applied in immunology, neuroscience, and allergy research to investigate mast cell activity, inflammatory responses, and neurochemical pathways. The assay supports high-throughput analysis with high sensitivity and specificity, making it suitable for both clinical research and drug development studies involving histaminergic systems.