Speed without Structure (IMAGE) Rockefeller University Caption Because it lacks a predictable structure, an FG Nup (green), a component of the nuclear pore complex, can interact quickly with a transport factor (purple) bound to large cargo. This interaction makes selective and rapid transport into and out of the nucleus possible. Credit Laboratory of Cellular and Structural Biology at The Rockefeller University Usage Restrictions Image may be used only to illustrate research described in the accompanying release. 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.