just as in the original nuclease hydrolysate of the nuclei and after its fractionation on a sepharose 4b , mononucleosomes are found to include several fractions ( up to four ) varying in their protein moieties and sizes of dna segments mononucleosomes obtained from the nuclei contain an additional non-histone protein as a minor component .
C0007610
nuclei
C0019652
histone