Maud Menten (1879-1960) was a pioneering Canadian biochemist and physician. She co-authored the Michaelis-Menten law of enzyme kinetics (1913), a cornerstone of biochemistry. She was one of the first Canadian women to earn a doctorate in medicine.
Maud Menten(1879 — 1960)
Maud Menten
Canada
8 min read
Frequently asked questions
Key Facts
- 1879: born in Port Lambton, Ontario, Canada
- 1913: publication of the law of enzyme kinetics with Leonor Michaelis in Berlin
- 1916: earned a doctorate in biochemistry from the University of Chicago
- Pioneer: one of the first Canadian women licensed to practice medicine
- 1960: died in Toronto, leaving a major scientific legacy in enzymology
Works & Achievements
Article co-written with Leonor Michaelis, published in the Biochemische Zeitschrift. It introduces the fundamental equation V = Vmax[S]/(Km+[S]) describing the rate of enzymatic reactions, a cornerstone reference in biochemistry worldwide.
A histochemical method devised by Menten to visually locate enzymes within tissue sections using azo dyes. This technique is still used in laboratories around the world.
Menten's earliest research, examining the effects of radioactive radiation on embryonic cells, conducted at the University of Chicago during a pioneering era of nuclear physics applied to biology.
A study of this key enzyme in cellular respiration, contributing to the understanding of enzymatic mechanisms involved in the body's gas exchange.
Menten was among the first scientists to use radioactive isotopes as tracers to track biochemical reactions in living cells, foreshadowing modern techniques in molecular biology and medical imaging.
Anecdotes
In 1912, Maud Menten had to leave Canada and travel to Berlin to work with biochemist Leonor Michaelis. At the time, women were not permitted to conduct research at most Canadian institutions. Far from seeing this as an obstacle, she crossed the Atlantic alone and settled in the German capital for an intense year of research that would change the history of biochemistry.
The Michaelis-Menten equation, published in 1913, became one of the most cited formulas in the entire history of biology. Yet for decades, Maud Menten received only limited recognition, her name often overshadowed by that of her male co-author. It was only much later that the scientific community fully acknowledged the extent of her personal contribution to the experiments.
Maud Menten was a remarkable individual: a polyglot who spoke at least six languages including Russian and German, an accomplished watercolor painter, a mountaineer, and an amateur singer. She embodied the ideal of the scientist who embraced both art and adventure, at a time when women were still largely excluded from universities and laboratories.
At the University of Pittsburgh, where she worked from 1918 to 1950, Menten developed a histochemical staining technique — azo coupling — still used today in laboratories around the world to visualize enzymes in biological tissues. She was also among the first to use radioactive tracers in biology.
Despite a brilliant career and major discoveries, Maud Menten never obtained a tenured professorship at the University of Pittsburgh, running up against the same institutional barriers faced by all women scientists of her era. She returned to Canada at the end of her life and died in 1960 in Leamington, Ontario, leaving behind a considerable scientific legacy.
Primary Sources
Wir haben die Kinetik der Invertinwirkung systematisch untersucht und gefunden, dass die Reaktionsgeschwindigkeit von der Substratkonzentration in einer charakteristischen Weise abhängt, die sich durch eine einfache mathematische Formel ausdrücken lässt.
A method is described for demonstrating the localization of alkaline phosphatase in tissue sections by means of the coupling of a diazonium salt with naphthol liberated by the enzyme, producing a visible colored precipitate at the exact site of enzyme activity.
The influence of radium emanation upon cell division was investigated. Results indicate a marked inhibitory effect upon the rate of division proportional to the concentration of radium applied.
Carbonic anhydrase was isolated and its kinetic properties examined. The enzyme was found to catalyse the reversible hydration of carbon dioxide at a rate far exceeding any known chemical catalyst.
Key Places
Maud Menten's birthplace, situated on the shores of Lake St. Clair. It was in this rural Canadian setting that she grew up before embarking on an exceptional academic journey.
The institution where Maud Menten earned her Bachelor of Medicine in 1907 and her medical doctorate in 1911, among the first women admitted to medical sciences in Canada.
It was in this Berlin laboratory that Menten and Michaelis carried out, in 1912–1913, the decisive experiments on the enzymatic kinetics of invertase, giving rise to their landmark equation.
Maud Menten conducted her earliest research on radium here as early as 1910, then completed her doctorate in biochemistry in 1916, deepening her scientific training.
The main site of her scientific career from 1918 to 1950, where she carried out important research in histochemistry and developed the azo-coupling technique whose influence endures to this day.
