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The Discovery of Calvin Cycle
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2007-9-13
In late 1950s, USA biochemist Melvin Calvin discovered the laws of plant photosynthesis named "Calvin Cycle" after him, i.e., the cyclic process of chloroplast to convert carbon dioxide into carbohydrate in organism through photosynthesis. He is the first person to disclose the very fundamental life process of the nature and his discovery of carbon dioxide assimilation in plants has a great significance to the research on the origin of life. Also for this remarkable discovery, Melvin Calvin won the Nobel Prize in Chemistry in 1961.
Calvin Cycle is also known to us as photosynthesis carbon cycle - a kind of metastasis process similar to Kerbs Cycle, which enables substance molecule going into and departing from this cycle before generated another kind of substance. Carbon joins into Calvin Cycle in form of carbon dioxide and departs from Calvin Cycle in form of sugar. The entire process of Calvin Cycle is powered for ATP and consumes NADPH with decreasing energy level so that high-energy electron can be increased for producing sugar. Carbohydrate directly produced from Calvin Cycle is not glucose, instead it is a kind of sugar called glyceraldehyde 3-phosphate (G3P). In order to synthesize a mol of such kind of sugar, the entire process of cycle must have three times of metalepsis for anchoring three mol of carbon dioxide. Calvin Cycle is one part of photosynthesis dark reaction.
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Organizer:
Beijing Municipal Association for Science & Technology
Undertaker: Beijing Science & Technology
Consulting Center,
Information Center of Beijing Municipal Association for
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