GtaC Rhythmically Moves in and out of the Nucleus (image) Johns Hopkins Medicine Share Print E-Mail Caption Levels of the regulatory protein GtaC, tagged with green fluorescent protein, increase in the nucleus every six minutes. GtaC turns on genes that prepare cells to move. The image is a compilation of eight photos, taken at 3.5 minute intervals, showing GtaC's location in a single cell as it moves. Credit Huaqing Cai Usage Restrictions None 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.