Parkinson's-linked Protein in Human Colon (IMAGE) Duke University Medical Center Caption An image of tissue from a human colon uses fluorescent staining to show the presence of the protein alpha-synuclein (red) inside gut endocrine cells (green). Credit 2017, JCI Insight Usage Restrictions Credit 2017, <i>JCI Insight</i> 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.