B-Galactosidase-Deficient E. coli Slant Culture

For use in pBLU transformation experiments. This is a mutant E. coli strain incapable of producing B-galactosidase, which is necessary for the breakdown of lactose or X-gal, a lactose analog. When these bacteria are transformed with pBLU, they will break down X-gal (and lactose) and this results in blue colonies. Slant culture. Note: Culture should be used within 1 month but is best used within 2 weeks of delivery. Store at +4 C.