IN a world first, researchers from NSW have discovered the gene responsible for depression. After 25 years' research, scientists have found that people who carry a particular gene are more likely to suffer depression regardless of their life experiences. The medical breakthrough will have major ramifications for diagnosis and treatment of the disease which affects one in four Australians. The study, to be published in the prestigious British Journal of Psychiatry this week, shows that people who carry a short serotonin transporter gene are predisposed to depression. Conversely, those who carry a long version of the serotonin transporter gene would...