the dnas from normal and leukemic lymphocytes of blood , lymphonodi and spleen differ in ther acceptor ability in the reaction of heterologous methylation in vitro , induced by dna-methylase from enterobacter cloacea in the presence of [ 3h-methyl ] s-adenosyl methionine : the ratio of radioactivities in methylated cytosine and adenine residues ( m5c/m6a ) in leukemic lymphocyte dna is much lower than in healthy animals ' lymphocytes .
C0025723
methylation
C0012873
dna-methylase