by Amy Cheng Vollmer — Years ago, path­ways of in­ter­me­di­ary me­tab­o­lism made up a sig­nif­i­cant por­tion of bio­chem­istry and mi­cro­bi­ol­ogy courses. Therein, stu­dents learned about in­ter­con­ver­sions and con­nec­tions be­tween path­ways, and they could fol­low the car­bons as they moved from ac­etate into the cho­les­terol mol­e­cule...