Structural comparisons reveal diverse binding modes between nucleosome assembly proteins and histones.

"three complex structures of histone h2a-h2b dimer bound to nap are available from s cerevisiae (scnap1; pdb id: 5g2e) c elegans (cenap1; pdb ids: 6k00 and 6k09) and a thaliana (atnrp1; pdb id: 7c7x) [ ].; italicized residues belong to fusion protein h2b 1-h2a the three-dimensional structures of c elegans nap1 (cenap1) in complex with h2b 1-h2a fusion protein (pdb id: 6k00 and 6k09) and cenap1-h2az-h2b complex (pdb id: 6k0c) are available [ ]."

"Declarations Ethics approval and consent to participateNot applicable. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This study received no funding."