title: Terminal deoxynucleotidyl transferase (TdT) enzyme in thymus and bone marrow. I. Age-associated decline of TdT in humans and mice.
mesh_terms: D000375:Aging; D000818:Animals; D001853:Bone Marrow / Q000201:enzymology*; D002469:Cell Separation / Q000379:methods; D004253:DNA Nucleotidylexotransferase / Q000378:metabolism*; D004254:DNA Nucleotidyltransferases / Q000378:metabolism*; D006801:Humans; D008214:Lymphocytes / Q000166:cytology; D051379:Mice; D013154:Spleen / Q000201:enzymology; D013601:T-Lymphocytes / Q000201:enzymology*; D013950:Thymus Gland / Q000201:enzymology*
chemical_list: D004254:DNA Nucleotidyltransferases; D004253:DNA Nucleotidylexotransferase