History
Diphtheria toxin was discovered in 1890 by Emil Adolf von Behring. In 1951, Freeman found that the toxin gene was not encoded on the bacterial chromosome, but by a lysogenic phage infecting all toxigenic strains.
Read more about this topic: Diphtheria Toxin
Famous quotes containing the word history:
“The history of persecution is a history of endeavors to cheat nature, to make water run up hill, to twist a rope of sand.”
—Ralph Waldo Emerson (18031882)
“Dont you realize that this is a new empire? Why, folks, theres never been anything like this since creation. Creation, huh, that took six days, this was done in one. History made in an hour. Why its a miracle out of the Old Testament!”
—Howard Estabrook (18841978)