Polarity protein (IMAGE) Stanford University Caption The movie shows the interactions between a polarity protein, BASL (magenta), and microtubules (black). Note how microtubules can grow into the polarized region but rapidly shrink back, creating a microtubule-depleted zone within the plant cell. Credit Andrew Muroyama Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.