Fruit Fly Brain (image) University of Cambridge Caption The fly brain is half a millimeter across and contains approximately 100,000 nerve cells (green). The A-beta peptide forms plaques (red) that are linked to nerve cell death and behavioral abnormalities in the flies. Credit Dr. Stanislav Ott, Department of Genetics, University of Cambridge Usage Restrictions Please credit 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.