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.
Jimmy Carter-Jimmy Carter was the thirty-ninth President of the United States. Reagan defeated Carter in the 1980 elections. Margaret Cleaver-Margaret Cleaver was Ronald Reagan's sweetheart for eight years during high school and college, and were engaged after graduating from Eureka College together in 1932.on Reagan-Ron Reagan was the son of Ronald and Nancy Reagan. Donald Regan-Donald Regan served as President Reagan's first Chief of Staff in the White House. He resigned because he could not work with First Lady Nancy Reagan.