A leading biochemist, she helped shape guidelines in the 1970s for genetic-engineering while calming public fears of a spread of deadly lab-made microbes. A leading biochemist, she helped shape guidelines in the 1970s for genetic-engineering while calming public fears of a spread of deadly lab-made microbes. Singer, Maxine F (1931-2024), Genetics and Heredity, Biotechnology and Bioengineering, Carnegie Institution for Science, National Institutes of Health, Deaths (Obituaries) NYT > Science