Dr. Shin, Iowa State University (IMAGE) Iowa State University Caption Yeon-Kyun Shin, professor of biochemistry, biophysics and molecular biology at ISU, has shown that the protein called synaptotagmin1 is the sole trigger for the release of neurotransmitters in the brain using this instrument that allows a new technique called single vesicle fusion method. Credit ISU photo by Bob Elbert 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.