Resistance to Tamoxifen (IMAGE) Université de Genève Caption A complex of factors (symbolized by six forms and different colors) assembled around the estrogen receptor ERα is involved in the appearance of the resistance to tamoxifen. Credit © UNIGE 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.