From 1924 until 1928 Hugo Theorell is an associate assistant of the Medico-Chemical Institution and from 1928 to 1929 a temporary associate professor. There he works under Professor Einar Hammarsten on the influence of the lipids on the sedimentation of the blood corpuscles.

Right after school Hugo Theorell starts studying medicine at the Karolinska Institute. He graduates as a Bachelor of Medicine in 1924.

For “his discoveries concerning the nature and mode of action of oxidation enzymes” Hugo Theorell gets the Nobel Prize in Physiology or Medicine.

In addition, from 1947 till 1949 Hugo Theorell takes the chair of the Association of Swedish Chemists. During this time he also crystallizes an enzyme form horse's liver.

Taking the chair of the Swedish Academy of Sciences, Hugo Theorell is also appointed as the leader of the International Union of Biochemists.

Back at the Karolinska Institut Hugo Theorell becomes a professor of Biochemistry.

Then, under Professor Calmette, Hugo Theorell studies bacteriology at the Pasteur Institute in Paris for three months.

In 1937 Hugo Theorell becomes the chief of the new founded Nobel Medical Institute, that is placed in the Karolinska Institutet.

In 1931 Hugo Theorell studies the molecular weight of myoglobin with the aid of the ultracentrifuge at Uppsala University. One year later he's appointed as associate professor in Medical and Physiological Chemistry.

Writing a doctoral thesis on the lipids of the blood plasma Theorell receives his medical doctor degree in 1930.

Alex Hugo Theodor Theorell is born at Linköping, Sweden as the son of Thure Theorell and his wife Armida Bill.

In 1931 Hugo Theorell marries the pianist Elin Margit Elisabeth Alenius, with whom he has three sons and one daughter.

Meanwhile Hugo Theorell's scientific focus lies on oxidation enzymes, especially cytochrome, catalase and riboflavin. He's the first, who describes the progress of alcohol dehydrogenase.

Being a member of the State Research Council for the Natural Science, Hugo Theorell becomes the Chief Editor of the journal Nordisk Medicin.

Not only being interested in natural sciences but also exalted by music and thus holding a membership of the Swedish Royal Academy of Music and the leadership of the Stockholm Symphony Society, Hugo Theorell dies on 15. August in 1982.

From 1912 until 1921 Hugo Theorell visits the State Secondary School at Katedralskolan in Linköping. He passes his matriculation examination in May 1921.

Then Hugo Theorell moves to Berlin for two years and works with Otto Warburg at the Kaiser-Wilhelm-Institute for Cell Physiology (now Archive of the Max-Planck-Society). There he builds the oxidation enzyme (“the yellow ferment”) for the first time and discovers two parts of it: the coenzyme part, the flavinmononucleotide and a colorless protein part by splitting.

Hugo Theorell is appointed to a professorship in physiological chemistry at the Karolinska Institutet.