Natural Killer Cell in Action (2 of 2) (IMAGE) Imperial College London Caption The detail of actin filaments inside an NK cell which can only be seen using the super-resolution microscope. Credit Imperial College London Usage Restrictions None 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.