HeLa Cells Stained with SiR-Hoechst (video) Ecole Polytechnique Fédérale de Lausanne Share Print E-Mail Loading video... Caption This is time-lapse confocal imaging of Hela cells stained with SiR-Hoechst. Credit Kai Johnsson/EPFL Usage Restrictions To be used only for journalistic, education, non-commercial purposes. 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.