9/7/2012 7:23:38 AM
Scientists at Washington University School of Medicine in St. Louis have identified a protein essential to repairing the intestine's inner lining. That lining is among the body's busiest highways, trod not only by the food we ingest but also by trillions of microorganisms that aid digestion. Because the intestine plays key roles in absorbing nutrients and containing the microbes, any damage must be fixed promptly.
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