Cells (IMAGE) Johns Hopkins Medicine Caption Cells with Huntington's disease lack the enzyme that creates cysteine and die in environments without it (Left). Cells treated with monensin have cysteine stores and are better prepared to survive in environments with little cysteine (Right). Credit Juan Sbodio Usage Restrictions None License Licensed 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.