title: Nitrogen fixation by photosynthetic bacteria.
abstract: In 1949, Howard Gest and Martin Kamen published two brief papers in Science that changed our perceptions about the metabolic capabilities of photosynthetic bacteria. Their discovery of photoproduction of hydrogen and the ability of Rhodospirillum rubrum to fix nitrogen led to a greater understanding of both processes.
authors.affiliation: Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, WI, 53706, USA, pludden@cals.wisc.edu.
authors.forename: Paul W
authors.initials: PW
authors.lastname: Ludden
authors.forename: Gary P
authors.initials: GP
authors.lastname: Roberts