Scientist Picking Molecules from a Tree (IMAGE) Whitehead Institute for Biomedical Research Caption Scientist picking molecules from a tree. Credit Steven Lee/Whitehead Institute Usage Restrictions Credit is given to Steven Lee/Whitehead Institute 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.