Neurons express Aplp1 (IMAGE) Johns Hopkins Medicine Caption Neurons express Aplp1 (in white), a key protein that allows brain cells to absorb Parkinson’s-disease causing alpha-synuclein. Credit Yasuyoshi Kimura, Ph.D. Usage Restrictions none 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.