Sorghum and Tannin (IMAGE) Cell Press Caption In this illustration, the left part shows the sorghum line avoided by bird contains the wild-type version of Tannin1. The right part shows the sorghum line preferred by bird has a mutanted version of the gene-tan1-a/b. Credit Designed by Shijia Tang Usage Restrictions Credit Required. 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.