Seungyu Rah

Pohang University of Science and Technology

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About

Seungyu Rah is a leading figure in synchrotron radiation instrumentation and macromolecular crystallography, with a focus on advancing beamline technology for structural biology. His most notable contribution is the development and characterization of the BL-11C Micro-MX beamline at Pohang Light Source II, a high-flux microfocus facility designed for studying micrometre-sized protein crystals. This in-vacuum undulator-based beamline, which became operational in June 2017, offers energy tunability from 5.0 to 20 keV, enabling both conventional and micro-crystallography experiments. Rah’s work on BL-11C has been highly cited (28 citations), reflecting its critical role in enabling researchers to solve protein structures from tiny, often difficult-to-grow crystals. By providing a stable, high-brilliance X-ray source, his contributions have significantly enhanced the capabilities for structural biology research in South Korea and beyond. Rah’s achievements underscore his expertise in beamline design and his impact on the broader scientific community, facilitating breakthroughs in understanding biological macromolecules at atomic resolution.