One factor that may enable Ethiopians to tolerate high altitudes and hypoxia is the endothelin receptor type B (EDNRB) gene. Researchers at University of California, San Diego School of Medicine ...

They found that control of these cells, known as melanocyte stem cells, is regulated by two key signalling pathways - part of the endothelia receptor type B (EdnrB) and Wnt signalling pathways.