IBI’s LB Agar Lennox is used in molecular genetic studies. It is a nutritionally rich media for the growth and maintenance of pure cultures of recombinant strains of E.coli. The inclusion of casein peptone and yeast extract supply essential growth factors, such as nitrogen, carbon, sulfur, minerals, and vitamins. Sodium chloride also provides essential electrolytes. Agar is used as a solidification agent.