Antibodies in Action (IMAGE) Aarhus University Caption The figure shows human blood vessel cells (endothelial cells) grown outside the body. When endothelial cells are grown on a mixture of proteins that normally surround blood vessels, they form blood vessel-like structures (right photo). When recombinant antibodies are added, the cells are no longer able to form the blood vessel-like structures (left photo). Credit Peter Kristensen 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.