Task: Text Categorization
Input (English): Proteins involved in their regulation may include CIRCE and CAP, which binds to cAMP under conditions of low glucose. One of these is involved in the regulation of the porin OmpG, while IS1 and IS5 are insertion elements which cause activation of another of them. The most widely accepted model of their function, developed after studying one coding for beta-galactoside, is named after Jacob and Monod. For 10 points, name this group of related genes, including an operator and promoter, which is transcribed together in prokaryotes, the most famous of which is the lac one.
Output (English): Science