A chemist who won the 1982 Nobel Prize in Chemistry for developing crystallographic electron microscopy. He was also the director of the Laboratory of Molecular Biology at Cambridge from 1986 to 1996.
He studied crystallography at the University of Cape Town.
He worked with Rosalind Franklin at a lab at the University of London.
He had two children with his wife Liebe Bobrow.
He was knighted by Queen Elizabeth II in 1988.