Pfaff at microscope (IMAGE) Penn State Caption A research team led by Sarah Pfaff, postdoctoral scholar in biology at Penn State, used their new method to explore how banding patterns in specialized plant cell walls are made. Credit Michelle Bixby/Penn State Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.