Stories by Salvador E. Luria

A personal account of the epochal discovery that identified DNA as the genetic material

The active transport of selected substances into the cell needs energy. Colicins, antibiotics made by bacteria, can stop active transport and can therefore be used to study how it is achieved

Some bacteria have enzyme systems that scan invading DNA molecules injected by viruses and break them unless they are chemically marked at specific recognition sites

On teaching biology in a biological revolution

T2 is a virus which dissolves bacteria. Normally its attack is followed by the appearance of a generation of new viruses. But sometimes the Viruses appear to be missing. Why?