PROTAC diagram (IMAGE) Walter and Eliza Hall Institute Caption Disease proteins (target) are attached to a degradation tag (tag). Upon treatment with a tag-binding PROTAC drug, the target is signaled for removal by recruitment of the E3 complex that attaches the degrader signal ubiquitin (Ub). Credit WEHI Usage Restrictions N/A 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.