three classes of non-histone proteins were obtained from hamster kirkman-robbins hepatoma and liver nuclei following separation of nucleic acids with the polyethylene glycol-dextran mixture and fractionation of nuclear proteins on hydroxylapatite in a salt-glycerol-phenylmethylsulphonyl fluoride system at increasing concentrations of na+ and k+ phosphate buffer , ph 6.8 .
C0019652
histone
C0007610
nuclei