(IMAGE) Nara Institute of Science and Technology Caption Mutually repressive WOX13 and WUS play key roles in cell fate specification of pluripotent callus cells. Schematic illustration of the regulatory mechanisms (left) and spatial expression patterns of WOX13 and WUS in callus cell population (right). Credit Momoko Ikeuchi Usage Restrictions Credit required License Original 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.