reassociation of a 260-base pair cloned fragment of lytechinus variegatus dna with core histones has been shown to give rise to a uniquely positioned nucleosome ( simpson , r. t. , and stafford , d. w. ( 1983 ) proc . natl . acad . sci . u. s. a . 80 , 51-55 ) .
C0019652
histones
C0028623
nucleosome