Terminal deoxynucleotidyl transferase (TdT) is an enzyme marker for primitive __________ cells.

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Terminal deoxynucleotidyl transferase (TdT) is an enzyme marker that is commonly used to identify lymphoid cells, specifically the immature or primitive ones. TdT is expressed during the early stages of B and T cell development and is involved in the insertion of nucleotides into DNA during V(D)J recombination, a process that generates the diversity of antigen receptor genes in lymphocytes. TdT is not specific to myeloid or megakaryocytoid cells.

Terminal Deoxynucleotidyl Transferase (TdT) Is an Enzyme Marker for Primitive