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PGAL

Definition

Acronym for Phosphoglyceraldehyde, a chemical compound that serves as an intermediate in several central metabolic pathways in all organisms.


Supplement

This compound is an intermediate of photosynthesis and of glycolysis and gluconeogenesis.

It also is a byproduct in the biosynthesis pathway of tryptophan, an essential amino acid. It also occurs as a reactant in the biosynthesis pathway of thiamine (Vitamin B1), another substance that cannot be produced by the human body.

Synonym: glyceraldehyde 3-phosphate (G3P or GAP), triose phosphate, 3-phosphoglyceraldehyde (GADP).
See also: glycolysis.


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photosynthesis

Suppose that you are measuring CO2 exchange by a leaf. During the time period of your measurement, 1.20E+7 molecules of glyeraldehyde phosphate (PGAL) are made from CO2 in photosynthesis and 1.00E+6 molecules of glucose are used in cellular respiration. How many net molecules of CO2 would you ...

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by Anonymous
Mon Sep 10, 2012 7:57 am
 
Forum: General Discussion
Topic: photosynthesis
Replies: 1
Views: 3380

calvin cycle question

If 48 molecules of CO2 enter the Calvin Cycle, How many molecules of glyceraldehyde phosphate (PGAL) leave the cycle? How many molecules of ribulose bisphosphate (RuBP) will be produced? How many molecules of ATP will be utilized? I am SO clueless. help wanted!

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by Anonymous
Mon Sep 10, 2012 6:13 am
 
Forum: General Discussion
Topic: calvin cycle question
Replies: 2
Views: 2967

Photosynthesis

... and independent reactions go, as well as other physiological adaptations, but what I am unclear about is the amount of photons needed to produce a PGAL molecule. So I'm asking how many nadph and ATP are produced through the 2 electrons that are excited? This is probably a simple answer but it's ...

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by Gilby101
Sat Apr 14, 2012 2:32 pm
 
Forum: Physiology
Topic: Photosynthesis
Replies: 2
Views: 3503

the Calvin cycle???help please

... that it is electron, not hydrogen, what is provided ;) The hydrogen is there just to keep it electroneutral ;) Yes, RuBP is recycled, as well as PGAL is recycled (just by another part of the cycle ;) ). I wrote it bad, it was supposed to be "is used for recycling" ;) About the last ...

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by JackBean
Tue Oct 13, 2009 2:36 am
 
Forum: Botany Discussion
Topic: the Calvin cycle???help please
Replies: 15
Views: 18731

Photosynthesis Trivia

... begins soon after sundown and ends before sunrise. (C.) The five carbon sugar is constantly being regenerated. (D.) One of the end products is PGAL. (E.) The pathway used is usually a 3-carbon pathway, although a 4-carbon pathway does exist in some species. 12. The most stable form of chemical ...

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by vstexas09
Mon Oct 13, 2008 12:46 am
 
Forum: Cell Biology
Topic: Photosynthesis Trivia
Replies: 5
Views: 30723
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