Biosynthesis of the Yellow Aryl Polyene (IMAGE) Goethe University Frankfurt Caption Biosynthesis of the yellow aryl polyene protective pigments from simple precursors that are very widespread in bacteria. Credit Maximilian Schmalhofer 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.