Adaptive Variation (image) Brown University Share Print E-Mail Caption Using a new machine learning approach, researchers at Brown's Center for Computational Molecular Biology found adaptive mutations in metabolic genes in a group of African hunter-gatherers. One mutation the software found is closely linked to a protein-altering mutation that is virtually absent in populations around the world, but has a frequency of 27 percent in the hunter-gatherer genome data. Credit Ramachandran Lab / Brown University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.