after the nuclei were incubated in the presence of 20 micron m s-adenosyl-l- [ methyl-3h ] methionine ( 1 ci/mmol ) , the nhcp were separated from histones on hydroxylapatite and fractionated further on sodium dodecyl sulfate-acrylamide slab gel electrophoresis .
C0007610
nuclei
C0019652
histones