Phylogenetic reconstruction of NAP family of histone chaperones from various eukaryotic taxa. A phylogenetic tree was constructed to determine evolutionary distances among the members of NAP family of histone chaperones from Arabidopsis thaliana (named by prefixing ‘At’), Oryza sativa (named by prefixing ‘Os’), Chlamydomonas reinhardtii (represented by the prefix ‘Cre’ with the locus id), Physcomitrella patens (represented by the prefix ‘Phpat’ with the locus id), Selaginella moellendorffii (named by prefixing ‘Sm’), Picea abies (named by prefixing ‘Pa’), Saccharomyces cerevisiae (named by prefixing ‘Sc’), and Homo sapiens (named by prefixing ‘Hs’). For generation of the tree, the protein sequences were aligned using ClustalX2 and the tree was constructed using MEGA 6.06 and viewed using iTOL. Maximum Likelihood method was used for construction of the tree and the reliability of the branches was inferred from a bootstrap analysis of 1000 replicates. Bootstrap values above 50% have been shown as numbers. Star mark shows the position of HsSET in the tree. The sequence ids of the proteins used for the generation of the tree have been given in Table 1 (for Arabidopsis), Table 2 (for rice), and Additional file 2: Table S2 (for S. cerevisiae, and H. sapiens) and Additional file 3: Table S3 (for rest of the studied species).