Scientists with <i>Arabidopsis</i> Plants (IMAGE) DOE/Brookhaven National Laboratory Caption The team -- including Chang-Jun Liu (front), Yanzhai Song (rear), and Yunjun Zhao (rear right) -- used variations of Arabidopsis plants lacking genes for specific electron-shuttle proteins to confirm their hypothesis that one of these shuttle proteins, CB5D, is exclusively involved in the production of S-lignin building blocks. Credit Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research 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.