• citric acid
  • At this time, performing ongoing research in the field of biological respiration, Szent-Györgyi discovered and identified the catalysis of fumaric acid among other steps of the tricarboxylic acid cycle (also referred to as Szent-Györgyi-Krebs cycle, citric acid cycle), an essential component of cellular respiration that provides reducing equivalents for terminal oxidation and thereby energy production from metabolic products of dietary macromolecules. (hindawi.com)
  • Aconitase is the enzyme that is responsible for the isomerization of citrate to isocitrate in the citric acid cycle. (slideserve.com)
  • proteins
  • For this reason living organisms have developed a large and complex network of antioxidant molecules and enzymes, able to protect cellular components such as nucleic acids, proteins and lipids from oxidative damage. (mdpi.com)
  • Research
  • His early research activities in Groningen and later in Cambridge conducted on biological combustion, cellular respiration, and energy production of plants lead to the discovery of a reducing substance called "hexuronic acid," a substance that is able to lose and regain hydrogen atoms and capable of protecting plants from "browning," an injury that he characterized as oxidative damage due to the excessive activity of an enzyme, peroxidase. (hindawi.com)