A missing step in a metabolic pathway leads to the build-up of toxic compounds, and the lack of materials essential for normal function. Professor Wyatt Yue explores how genetic defects lead to disease at the molecular level, by determining 3D structures and biochemical properties of enzymes and protein complexes linked to congenital genetic errors. Professor Yue works closely with clinicians and paediatricians to decipher the underlying genetic, biochemical and cellular mechanisms of these diseases. His long-term aim is to help design novel therapeutic approaches for metabolic diseases. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/