reconstituted npcs were prepared from sv40 dna and the combination fraction of five histones , h1 , h2a , h2b , h3 , and h4 , isolated from the nuclei of permissive ( cv-1 ) or nonpermissive ( balb/c 3t3 , rat liver , and calf thymus ) cells .
C0007610
nuclei
C0007634
cells