Used in immunological research to detect and quantify membrane-bound immunoglobulin D (mIgD) on human B cells. This kit enables scientists to study B cell activation, differentiation, and immune response regulation. It is particularly useful in investigating autoimmune diseases, allergic responses, and B cell malignancies by measuring mIgD expression levels in clinical or experimental samples. The assay supports high-throughput analysis and provides a reliable tool for monitoring changes in B cell surface markers under various treatment conditions or disease states.