Lithium brake can be used in the laboratory as buffer for gel electrophoresis of DNA and RNA. It has a lower conductivity, produces crisper resolution, and can be run at higher speeds than can gels made from TBE or TAE (5-50V/cm as compared to 5-10V/cm).a salt or ester of boric acid. Salts of boric acid consist of BO3 and BO4 units linked together