Heterodimer Delivery Scaffold (IMAGE) Tufts University, Health Sciences Campus Caption This is an illustration of heterodimer chain attaching to Botulinum molecule at various binding sites. Credit Illustration courtesy Beth Mellor/TUFTS Usage Restrictions Credit required 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.