by Christoph — Say, you are a stu­dent in a mol­e­c­u­lar ge­net­ics lab course or a more ad­vanced cloning ex­pert, you will in­evitably have to deal with E. coli. And to make E. coli bac­te­ria grow quickly, stan­dard pro­to­cols al­most al­ways sug­gest us­ing LB medium as a "rich medium". You fol­low the pro­to­col...