Calvin Cycle - Please Help!

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zsnow39
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Calvin Cycle - Please Help!

Post by zsnow39 » Tue Dec 15, 2009 10:17 pm

Why can only 1 out of every 6 fixed carbon dioxide molecules be incorporated into making a carbohydrate in the Calvin Cycle?

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jwalin
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Post by jwalin » Wed Dec 16, 2009 1:14 am

the calvin cycle only needs 1( actually speaking 3 but only one to combine with RuBP) co2 but what do we get. we get a 3 carbon (triose phosphate). the other 3 c's are needed here and the other 2 are needed in taking another triose phosphate to rubp
it isn't what you do that matters but it is how you do it

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JackBean
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Post by JackBean » Wed Dec 16, 2009 11:06 am

In the cell, there are plenty of all the enzymes involved in the Calvin cycle and they run all the time. That is, there is "constant" flux in all these pathways.
Also, ALL of the fixed carbons are in result converted to some sugar and processed in further metabolism. If that wasn't the case, you would gain more intermediates leading to higher flux in other pathways.
On the other hand, if you wished to use more, than fixed carbons, you would deplete your intermediates, theoretically leading up to stopping of the Calvin cycle ;)
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

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jwalin
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Re:

Post by jwalin » Thu Dec 17, 2009 3:21 am

so what i thought was right.

:P
it isn't what you do that matters but it is how you do it

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JackBean
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Post by JackBean » Thu Dec 17, 2009 10:12 pm

was it?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

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