this indicates that it is not the synchronous action of both complexes which is required for nucleosome assembly , but that their cooperative action can be resolved into two steps : deposition of h3 and h4 from the n1/n2 complexes onto the dna and completion of nucleosome core formation by addition of h2b and h2a from the nucleoplasmin complexes .
C1518457
nucleosome core
C0019646
h2a