Frog Embryo (IMAGE) Salk Institute Caption The Salk researchers discovered the master gene that tells cells to develop multiple hair-like cilia, such as those seen in pink in this false-colored electron microscope image of the surface of a frog embryo. Credit Courtesy of the Salk Institute for Biological Studies; Chris Kintner, Molecular Neurobiology Laboratory, and Matthew Joens and James Fitzpatrick, Waitt Advanced Biophotonics Center Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.