apparently normal nucleosome core particles containing two molecules each of the four core histones in association with 145 base pairs of dna and a particle containing one molecule each of histones h2a and h2b in association with approximately 40 base pairs of dna were also generated during nuclease treatment of the histone-dna complexes formed under physiological ionic strength conditions .
C1518457
nucleosome core particles
C0019646
histones h2a