Glycolysis question

[joonkimdds]

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Kaplan says net reaction for glycolysis is
Glucose + 2ADP +2Pi + 2NAD+ ==> 2pyruvate + 2ATP + 2NADH + 2H+ +2H20

I don't understand why the product is 2ATP instead of 4ATP.
oh and by the way, is pyruvate same as PGAL? because I think both of them have 3 carbon, don't they or what's different?

 

[aranjuez]

Pyruvate is definitely not PGAL. PGAL is 3-phosphoglyceraldehyde.

In the beginning of glycolysis, you have to use 2 ATP to phosphorylate your glucose. Then you produce 4 ATP later. That makes a net product of... 2 ATP.

aranjuez

 

[joonkimdds]

Pyruvate is definitely not PGAL. PGAL is 3-phosphoglyceraldehyde.

then what about PGA? doesn't it have 3C?
in calvin cycle, i thought Glucose(6C) ==> 2 PGA because PGA is 3C ?

oh by the way, do i need to memorize names such as glucose 6-phosphate, fructos 6-phosphate, fructos 1,6-diphosphate, glyceraldehyde 3-phosphate, dihydroxyacetone phostphate and stuff like that?

my professor told me to memorize the reactants and products of glycolysis but not those complicated names 🙂
that must be why i am confused between pyruvate and PGA, PGAL stuff.


oh sorry but 1 more question 🙂
does glycolysis also make 2CO2?