(born 1943), English-born American molecular biologist and cowinner (with Phillip Sharp) of the 1993 Nobel prize in medicine or physiology, born in Derby. He obtained a doctorate in organic chemistry from the University of Sheffield, England, in 1968, and then pursued postdoctoral research at Harvard University until 1972. In that year Roberts was invited by Nobel laureate James D. Watson to join the staff at the Cold Spring Harbor Laboratory on Long Island, N.Y., where Roberts eventually became assistant director for research. In 1992 Roberts left the laboratory to become director of nucleated cell research at New England Biolabs in Beverly, Mass. He and Sharp each won their share of the Nobel prize for their independent discoveries that genes are often split and discontinuous. In 1977 each scientist separately showed that individual genes are often interrupted by long sections of “junk” genetic material that does not code for anything. These long sections were later termed introns. Their discovery changed the understanding of how genetic material evolved. see also in index Nobel Prizewinners,