- Denoting the ability of normal strains of the bacterium E. coli to metabolize lactose, or the genetic factors involved in this ability (which is lost in some mutant strains).More example sentences
- These strains might not even use their lac gene products to metabolize lactose.
- In addition to the lac operon, a number of other synthetic and natural genetic circuits have been analyzed for robustness and evolvability.
- A metabolite of lactose binds to the lac repressor, changing the protein's shape and thereby causing it to loosen its grip on the DNA.
1940s: abbreviation of lactose.