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.
Chariot Racing. The most popular sport in Rome was chariot racing. It was so popular that larger and larger stadiums had to be built. It is claimed that the Circus Maximus in Rome had room for more than 350,000 spectators. Chariots were usually pulled by four horses but it could be by as few as two or as many as ten.