rat liver chromatin subunits ( nucleosomes ) , which were isolated from nuclease-digested chromatin either treated or not treated with 0.5 % sodium deoxycholate and 5 % triton x-100 , were found to be similar with regard to sedimentation at 11 s and appeared as spherical particles with a diameter of about 100 a ( 1 a = 0.1 nm ) in electron micrographs .
C0008546
chromatin
C0028623
nucleosomes