3D Huntingtin protein (IMAGE) University of California - San Diego Caption A three-dimensional illustration of the Huntingtin protein. Produced in overabundance by the mutated HTT gene, it causes Huntington’s disease. Credit Cambridge Independent Usage Restrictions Use photo credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.