The core of the histones H2A and H2B can also be modified. Combinations of modifications are thought to constitute a code, the so-called histone code. Histone modifications act in diverse biological processes such as gene regulation, DNA repair, chromosome condensation (mitosis) and spermatogenesis (meiosis).
Bread and Circuses. Bread and circuses became the method that the ruling class of ancient Rome used to maintain their power and control of the people. This method kept their sheep fat and happy, even as they fleeced them and sent them off to plunder the free world.
Romans loved chariot races, which were held on special racetracks called circuses. The most famous circus, which was in Rome, was the Circus Maximus. In chariot races, two- or four-horse chariots ran seven laps totaling anywhere from three to five miles. Roman games included other type of equestrian events.