(IMAGE) Kumamoto University Caption Maturation of an immortalized human erythroid cell line, ELLU, toward an enucleated reticulocyte. ELLU was established by ectopic expression of HPV-E6/E7 genes, and it wasn’t necessary to turn-off expression of those genes but rather change the culture conditions to trigger the differentiation toward mature cells. In this image, a number of ELLU cells at various stages of differentiation can be seen. Credit Ms. Svetlana Soboleva Usage Restrictions To use this media elsewhere, the authors request that a reference to this release be included. License Original 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.