Optimal mAb (IMAGE) Scripps Research Institute Caption Janda and his team isolated a series of unique antibodies that were able to distinguish between heroin and its major psychoactive metabolites. After selecting four antibodies for their superior binding abilities, the researchers found that one clearly outperformed the rest in reversing heroin’s nociceptive and lethal effects. Credit Scripps Research Usage Restrictions With related coverage and credit 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.