HIV Outside Cell Nucleus (IMAGE) Loyola Medicine Caption IV-1 viral cores (red) accumulate around the cell nucleus (blue) but remain unable to enter following depletion of the motor protein KIF5B. Credit Loyola University Chicago 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.