Donald A. Bryant, professor emeritus of biochemistry and molecular biology at Penn State University, died August 28, 2024, at the age of 74. He was a member of the American Society for Biochemistry and Molecular Biology for over 35 years.

Bryant was born on March 12, 1950, to Roger Bryant Jr. and Wanda Partin Bryant in Henry County, Kentucky, and spent his early life on a dairy farm. He graduated as valedictorian of Oldham County High School in 1968. He then attended the Massachusetts Institute of Technology, earning a bachelor’s degree in chemistry and biology with honors in 1972. Bryant’s passion for bioenergetics led him to UCLA, where he obtained his Ph.D. in molecular biology in 1977.

Following his doctoral studies, Bryant pursued postdoctoral research at the Institut Pasteur in Paris and later at Cornell University. In 1981, he joined the faculty at Penn State University, where he dedicated over four decades to advancing the field of microbial physiology. In 1992, he was appointed the Ernest C. Pollard professor of biotechnology, a position he held until his retirement in 2022.

Bryant's research focused on chlorophototrophic bacteria, particularly cyanobacteria and green sulfur bacteria. His work provided significant insights into photosynthesis, including the discovery of how cyanobacteria adapt to far-red light by remodeling their photosynthetic apparatus. This finding has potential applications in enhancing crop productivity by expanding the usable light spectrum for photosynthesis.

Throughout his career, Bryant published nearly 450 scientific papers and mentored 86 graduate students and 38 postdoctoral researchers. According to his obituary, he often emphasized that his success was measured by the achievements of those he mentored, many of whom have become leaders in academia and industry.

Beyond his scientific endeavors, Bryant was an avid birdwatcher and photographer. He traveled extensively, capturing high-quality images of raptors and other bird species. He actively participated in the Stone Mountain Hawk Watch and supported various environmental organizations, including the Cornell Lab of Ornithology and Hawk Mountain Sanctuary.

Bryant is survived by mother, Wanda; brother, Larry; sister-in-law, Catherine; and nephews, Seth and Jordan.