any of a group of five small basic proteins, occurring in the nucleus of eukaryotic cells, that organize DNA strands into nucleosomes by forming molecular complexes around which the DNA winds.
Main Entry: his·tone Pronunciation: 'his-"tOn Function: noun : any of various simple water-soluble proteins that are rich in the basic amino acidslysine and arginine and are complexed with DNA in the nucleosomes of eukaryotic chromatin
histone his·tone (hĭs'tōn') n. Any of several small simple proteins that are most commonly found in association with the DNA in chromatin and contain a high proportion of basic amino acids.