Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!tdatirv!sarima
From: sarima@tdatirv.UUCP (Stanley Friesen)
Newsgroups: sci.bio
Subject: Re: Quiz time
Message-ID: <221@tdatirv.UUCP>
Date: 27 Apr 91 17:41:59 GMT
References: <1991Apr24.134105.25827@pa.dec.com> <212@tdatirv.UUCP> <1991Apr26.142343.9514@ccu.umanitoba.ca>
Reply-To: sarima@tdatirv.UUCP (Stanley Friesen)
Organization: Teradata Corp., Irvine
Lines: 28

In article <1991Apr26.142343.9514@ccu.umanitoba.ca> frist@ccu.umanitoba.ca writes:
>Ribulose bisphosphate is the acceptor for CO2 in the reductive pentose
>cycle aka Calvin cycle for carbon fixation. This reaction is catalyzed
>by ribulose bisphosphate carboxylase/oxygenase (RUBISCO). Ribulose
>bisphosphate is, therefore, about as intimately involved in photosynthesis
>as you can get!
 
>For those interested, the reaction in plants with C3 metabolism is
>
>3 Ribulose-bis-P + 3 CO2 --> 6 glyceraldehyde-3-phosphate

Quite.  As I remeber the details of this is there not also a
+ 12 H (in the form of NADH or some such, from the light reaction of
	photosynthesis)

Also, as I add up the numbers, doesn't this reaction also produce something
else (like 3 H2O ??).  [I seem to remember that the generic formula for
sugars (i.e. carbohydrates) is (CH2O)n].

leading to a reaction formula (for the dark reaction) of:
3 Ribulose-bis-P + 3 CO2 + 6 NADH2 -> 6 Glyceraldehyde-3P + 3 H2O + 3 NAD
[Of course the light reaction involved removing the hydrogen from *6* H2O].


Or am I getting mixed up somewhere?
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uunet!tdatirv!sarima				(Stanley Friesen)