Robert Haselkorn

Robert Haselkorn
Born(1934-11-07)November 7, 1934
Brooklyn, New York, U.S.
DiedFebruary 10, 2025(2025-02-10) (aged 90)
Chicago, Illinois, U.S.
Alma materPrinceton University
Harvard University
Known forCyanobacterial molecular genetics
Nitrogen fixation and heterocyst development
Plant viral RNA biology
AwardsNational Academy of Sciences (1991)
American Academy of Arts and Sciences
American Academy of Microbiology
Gregor Mendel Medal in Biological Science
Scientific career
FieldsMolecular biology
Microbiology
InstitutionsUniversity of Chicago
Doctoral advisorPaul Mead Doty

Robert Haselkorn (1934–2025) was an American molecular biologist and microbiologist who spent his career at the University of Chicago, where he helped establish cyanobacteria as model organisms for studies of nitrogen fixation, photosynthesis, and prokaryotic development. His work helped establish cyanobacterial molecular genetics and contributed broadly to molecular biology through early advances in viral RNA biology, genome sequencing, and gene regulation.