mono- di- , tri- , tetra- and larger oligonucleosomes were isolated by sucrose gradient centrifugation of micrococcal nuclease-digested chromatin , and their density distribution was analyzed , without fixation , in metrizamide/triethanolamine density gradients [ russev , g. and tsanev , r. ( 1976 ) nucleic acids res . 3 , 697-707 ] in which mono- and oligonucleosomes containing dense amino acids or 5-iododeoxyuridine separate from the corresponding normal nucleosomes .
C0008546
chromatin
C0028623
nucleosomes