RNA polymerase I is a large protein composed of 14 different subunits, known as polypeptides. It contributes to cell division by creating many of the components of ribosomes, the protein-producing ...

Researchers discover a new subunit of a bacterial RNA polymerase—as well as hints of its potential role in defending against viruses. Jef Akst was managing editor of The Scientist, where she started ...

A Portrait of RNA Polymerase This multicolored molecular “cloud” is a 3D rendering of an enzyme known as RNA polymerase II that’s responsible for transcribing the genetic code from DNA into RNA.