Horizontal gene transfer also plays a role in the spread of virulence factors, such as exotoxins and exoenzymes, amongst bacteria. A prime example concerning the spread of exotoxins is the adaptive evolution of Shiga toxins in E. coli through horizontal gene transfer via transduction with Shigella species of bacteria.
The brothers grew up on a succession of Oklahoma and Kansas homesteads during... On this day in 1911, President Ronald Wilson Reagan is born in Tampico, Illinois. Ronald Reagan, the 40th president of the United States, served for two terms from 1981 to 1989.
LOS ANGELES, California (CNN) -- Former President Ronald Reagan died Saturday at his home in Los Angeles. He was 93. Reagan led a conservative revolution that set the economic and cultural tone of the 1980s, hastened the end of the Cold War and revitalized the Republican Party.