Used in immunological research to quantify terminal deoxynucleotidyl transferase (TdT) enzyme levels in biological samples, primarily in blood or bone marrow. This kit is essential for studying hematopoietic cell development and differentiation, particularly in identifying immature lymphoid cells. It plays a critical role in leukemia research, as elevated TdT levels are a marker for acute lymphoblastic leukemia (ALL) and some types of acute myeloid leukemia (AML). The assay supports diagnosis, classification, and monitoring of lymphoid malignancies by providing a sensitive and specific measurement of TdT protein expression. Widely used in clinical laboratories and biomedical research for biomarker validation and therapeutic development.