A molecular diagnostics company, based in South San Francisco, California, which is one of the first to develop and commercialize practical applications built on insights from the Human Genome Project. It has developed a proprietary new method to non-invasively monitor the immune system by measuring gene expression in a patient's peripheral blood. The first application, AlloMAp Molecular Expression testing, specifically addresses the needs of clinicians and patients in the post-cardiac transplantation patient management market.