The Biophysical Technology Center is a self-supporting non-profit Internal Service Organization at the University of Minnesota under the Department of Biochemistry, Molecular Biology and Biophysics. It is open as a first priority to all University of Minnesota researchers, and to outside researchers by arrangement. The center goal is to make state-of-the-art instrumental resources for optical spectroscopy and EPR available to researchers, providing a venue for them to pursue their projects and develop their experience. Top priorities of the center personnel are to maintain the performance of these instruments at the highest level and to provide basic training to new users. As needed, the resident expertise in the center is available for consultation in sample preparation, data acquisition, and data analysis.