Every year, much of the energy the U.S. consumes is wasted through transmission, heat loss and inefficient technology -- costing American families and businesses money, and leading to increased carbon pollution.
histone /hisÂ·tone/ (hisÂ´tÅn) a simple protein, soluble in water and insoluble in dilute ammonia, found combined as salts with acidic substances, e.g., the protein combined with nucleic acid or the globin of hemoglobin. histone (hÄ­sâ²tÅnâ²)
Types of histones. Each octamer has two pairs of different histone proteins: H2A, H2B, H3 and H4. They are arranged as a pair of H2A-H2B dimers, and an (H3)2(H4)2 tetramer. There is an additional type of histone, the linker histone H1, which is present in condensed DNA. The C-terminal end is primarily responsible for histone-DNA and histone-histone interactions; 2  The N-terminal consists of a charged, flexible tail which in histones H2B and H3 bury into the minor grooves of DNA, probably to stabilise the interaction.