Thus, lactose, from which allolactose is formed, induces the expression of the lac operon and of genes required for lactose metabolism. In the absence of lactose in the environment, the lac operon ...

The 92-year-old bacterial geneticist who helped pioneer the study of gene regulation has passed away. Scientists dive into the genomes of whales, elephants, and other animal giants looking for new ...

The genes lacZ, lacY and lacA are transcribed from a single promoter (P) that produces a single mRNA from which the three proteins are translated. The operon is regulated by Lac repressor ...