Abstract
Summary
The incorporation of 3H-labeled methyl groups into DNA from normal and leukemic human leukocytes has been studied. The sp act of DNA were higher in leukocyte samples of acute lymphocytic leukemia (ALL) and acute myelocytic leukemic (AML) than in those of normal and chronic lymphocytic leukemia (CLL). The highest radioactivity was found in 5-methylcytosine with moderate radioactivity in thymine and low levels in adenine, 7-methylguanine, and cytosine.
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