Treatment with Gap 19 (IMAGE) University of British Columbia Caption The researchers used a molecule called Gap19 to block the hemichannels, in the same stroke model, which resulted in smaller stroke damage. Credit University of British Columbia 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.