Now, a new Northwestern University study shows that Pseudomonas putida, a common soil bacterium, completely reorganizes its metabolism to thrive on these complex carbons. By slowing down some metabolic pathways while accelerating others, the bacterium manages to extract energy from lignin without exhausting itself. The study, published in Communications Biology, marks the first quantitative blueprint of how bacteria coordinate carbon metabolism and energy production during digestion of lignin carbons. A delicate balanceWhile these strategies keep Pseudomonas putida balanced and functioning, the researchers also found the system is fragile. By revealing which pathways are speed bumps or energy boosters, the biotech industry can develop smarter strategies for harnessing bacteria to produce sustainable products from plant waste.