Key Protein May Affect Risk of Stroke (IMAGE) University of Gothenburg Caption This is the head of a mouse embryo in which the pericytes are visible as blue dots along the blood vessels. Credit University of Gothenburg 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.