Thale Cress Producing Protein (image) Salk Institute Caption The researchers identified three proteins involved in seed oil production in thale cress plants. This thale cress seedling is shown producing one of the proteins, evidenced by the blue stain on its stems and leaves. Credit Courtesy of Eve Syrkin Wurtele, Iowa State Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.