when the nuclei isolated from novikoff hepatomas were incubated in vitro with s-adenosyl-l- [ 3h-methyl ] methionine and the nuclear proteins were subsequently fractionated , histones were found to have incorporated the radioactivity of a four-to-five times higher rate than those of normal rat or tumor-bearing host rat liver nuclei .
C0007610
nuclei
C0028589
nuclear proteins