A gene that controls the way the body responds to the hormone insulin has been identified, marking a breakthrough in the fight against diabetes. Scientists believe a variation in the gene's DNA promotes insulin resistance, the primary cause of type 2 diabetes. The disease is the most common form of diabetes, affecting around two million people in the UK. The discovery could lead to new drug treatments that target the genetic fault and prevent the body failing to respond to insulin. The hormone controls the way cells absorb glucose from the blood and use it to generate energy. In type...