Schematic Image of This Research (IMAGE) Tokyo University of Agriculture and Technology Caption Just like an amphibian's development, molecules can metamorphosis into polyene substructures that are building blocks needed for antibiotics and cancer treatment drugs. Credit Masafumi Hirano. TUAT Usage Restrictions w/ credit 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.