20 agosto 2015
An unusual mutation in an immune system gene switches a receptor from one target molecule to another in Khoe-San people. It’s the first known example of such a change, say researchers, and likely leads to safer pregnancies. The Khoe-San — known for the unusual clicking sounds in their language — harbor unusually high genetic diversity, about 10 times more among their 100,000 people than among modern Europeans.
http://www.sciencedaily.com/releases/2015/08/150820144733.htm
