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  • Title: Thymidine kinase in human leukemia--expression of three isoenzyme variants in six patients with chronic myelocytic leukemia.
    Author: Munch-Petersen B.
    Journal: Leuk Res; 1990; 14(1):39-45. PubMed ID: 2304355.
    Abstract:
    In six patients with untreated, chronic myelocytic leukemia (CML), the dominating thymidine kinase (TK) activity was compared with the fetal form, TK 1, from mitogen stimulated and the adult form TK 2 from unstimulated normal human lymphocytes, and with TK-1-onc, TK-3-onc and TK-4-onc. This was done in human acute, myelocytic and monocytic leukemias, using the combined thymidine/dTTP enzyme kinetics for isoenzyme characterization. TK-1-onc was found in one, TK-2-onc in two and TK-3-onc in three CML patients. The suffix -onc indicates the difference in ATP kinetics and molecular weights between the normal and the leukemic thymidine kinases. A possible relation between the isoenzyme forms and the types of leukemias is discussed.
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