Dr. Lynne Howell and Dr. Don Sheppard (IMAGE) Canadian Glycomics Network Caption Dr. Lynne Howell (left) and Dr. Don Sheppard (right) solved the structure of a key enzyme responsible for biofilm formation in the fungal pathogen A. fumigatus. Credit University of Toronto (Dr. Lynne Howell), McGill University (Dr. Don Sheppard) 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.