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 strain of E. coli. The inclusion of casein peptone and yeast extract supplies essential growth factors to the E. coli bacterial culture; such as nitrogen, carbon, sulfur, minerals, and vitamins. Sodium chloride provides essential electrolytes. Agar is used as a solidification agent.