This BAG is composed of 6 working groups from 3 locations (universities of Cologne, Bochum, Duesseldorf),working with both MX and SAXS, the projectsfor this proposal are rather heterogeneous. Nonetheless, our research focuses on six primary themes: proteins involved in transport processes, immune system function, disease association, industrial enzyme applications, light harvesting, and signaling or fixation processes. Our research spans a wide range of biological processes, from membrane transport and pathogen defense to enzyme optimization for industrial and environmental applications. By obtaining high-resolution structures of these proteins, we aim to advance our understanding of their functions, paving the way for new therapeutic strategies, biotechnological innovations, and solutions to pressing environmental challenges.