Roderick K. Clayton

Roderick Keener Clayton (March 29, 1922 – October 23, 2011), known as Rod Clayton, was an American biophysicist known for his work on bacterial photosynthesis and photosynthetic reaction centers. He studied phototaxis in Rhodospirillum rubrum and later helped establish the concept, isolation, and spectroscopic characterization of bacterial photosynthetic reaction centers. He was elected to the National Academy of Sciences in 1977.

Early life and education Clayton was born in Tallinn, Estonia, on March 29, 1922, to John H. Clayton and Helena Mullerstein. His father was an American journalist working in Europe, and his mother was Estonian and worked at the American embassy in Tallinn.

Career After completing his doctorate, Clayton worked with Cornelis Bernardus van Niel at Stanford University's Hopkins Marine Station.

At Oak Ridge and later at Dartmouth and the Kettering Research Laboratory, Clayton turned increasingly to bacterial photosynthesis. Working with carotenoid-deficient mutants of Rhodobacter sphaeroides, he identified spectroscopic changes associated with a specialized bacteriochlorophyll component involved in the primary reactions of photosynthesis. He used the term "photosynthetic reaction center" for the site of energy trapping and charge separation in bacterial photosynthesis.

Clayton's work contributed to the isolation and characterization of bacterial photosynthetic reaction centers. In the early 1970s, his laboratory and George Feher's laboratory independently purified minimal reaction center preparations from Rhodobacter sphaeroides.

Clayton's group also worked on the pigment composition, fluorescence properties, electron acceptors, and quantum efficiency of bacterial reaction centers. His later work included studies of fluorescence, energy transfer, and the organization of photosynthetic units. He also wrote books on the physical and chemical mechanisms of photosynthesis, including Light and Living Matter and Photosynthesis: Physical Mechanisms and Chemical Patterns.

Honors and awards Clayton was elected a fellow of the American Association for the Advancement of Science in 1965. He was elected to the American Academy of Arts and Sciences in 1975 and the National Academy of Sciences in 1977.

He received Guggenheim Fellowships in 1973 and 1980. In 1982, he and George Feher shared the first Biological Physics Prize of the American Physical Society, now known as the Max Delbruck Prize.

Personal life Clayton married Betty Jean Compton in 1944. They had a son and a daughter. Betty Jean Clayton worked with him in the laboratory for many years and helped maintain bacterial cultures used in his research.

After her death in 1981, Clayton's scientific career ended early, and Cornell negotiated his retirement in 1984. He later lived in California, where he pursued photography, ceramics, drawing, butterfly collecting, and work with service dogs. Clayton died on October 23, 2011, at the age of 89.