Open and Shut (image) Rockefeller University Share Print E-Mail Caption The researchers examined in detail how the human cystic fibrosis protein (shown above) controls the flow of crucial ions in and out of cells. Credit Laboratory of Membrane Biology and Biophysics at The Rockefeller University/Cell Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. Share Print E-Mail 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.