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Using the radioactive carbon-14 isotope as a tracer, Calvin, Andrew Benson and their team mapped the complete route that carbon travels through a plant during photosynthesis. They traced the carbon-14 from its absorption as atmospheric carbon dioxide to its conversion into carbohydrates and other organic compounds. The single-celled algae Chlorella was used to trace the carbon-14.
3. Leave: A trio of three carbons leave and become sugar. The other trio moves on to the next step.
4. Switch: Using ATP and NADPH, the three carbon molecule is changed into a five carbon molecule.
5. The cycle starts over again.
The carbohydrate products of the Calvin cycle are three-carbon sugar phosphate molecules, or 'triose phosphates' (G3P). Each step of the cycle has its own enzyme which speeds up the reaction.
- "The Nobel Prize in Chemistry 1961 Melvin Calvin". nobelprize.org. http://nobelprize.org/nobel_prizes/chemistry/laureates/1961/. Retrieved January 14, 2011.
- Bassham J, Benson A, Calvin M (1950). "The path of carbon in photosynthesis". J Biol Chem 185 (2): 781–7. . http://www.jbc.org/cgi/reprint/185/2/781.pdf.
- CALVIN, M (1956), "The photosynthetic cycle.", Bull. Soc. Chim. Biol. 38 (11): 1233–44, 1956 Dec 7,
- Barker, S A; Bassham, J A; Calvin, M; Quarck, U C (1956), "Intermediates in the photosynthetic cycle.", Biochim. Biophys. Acta 21 (2): 376–7, 1956 Aug, ,
- Melvin Calvin (December 11, 1961). "The path of carbon in photosynthesis" (PDF). p. 4. http://nobelprize.org/nobel_prizes/chemistry/laureates/1961/calvin-lecture.pdf. Retrieved July 11, 2011.
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