KINETICS ON THE MICROBIAL SCALE
47
O1 = OXIDIZED FORM OF REDOX INTERMEDIATE i
i =I,.... N
Rj = REDUCED FORM OF REDOX INTERMEDIATE i -
N = 7
( i ) O l + R 2 x 02 + R1
(i) (AOP+P)+Oi +Rl,,^Z 0mt R. t(ATP÷Hz0)
(N-I) ADP+ P + On.i+Rn ^zz= On + Rn4+ ATP +He0
overall: 3ADP + 3P + O1 + Rn —> On + R1 + зАТР + зНгО
F!G. I - ELECTRON TRANSPORT PATHWAY STOICHIOMETRY
connected with the details of catalyst regeneration in the electron
transport scheme, and thus, does not show up explicitly in the stoichio-
metry for the redox steps.
|
ɪi |
= Intermediαte i |
i = о |
, I, .... M M- |
|
( I ) |
ɪo + θN ʌ — - |
I1 |
+ Rn +CO2 |
|
(2) |
I, ÷im |
1г | |
|
(i) I |
(H2O) +[0n] ÷Iμι≈=± |
i) ■ |
* [Rn] + {co2) |
|
(M) |
Iw-l + θN -=--- |
Im |
+ Rn |
|
OVERALL : |
3 H2O + I0 +5 On—*- |
5 ^N |
+ 3C02 |
FIG. 2- KREBS CYCLE STOICHIOMETRY
1 have simplified the coupling between the two pathways slightly.
Only the Qs-Rs pair appears in the Krebs cycle, although strictly speaking
O,.-1 _ Rn_ j should be involved in one step. In fact this oversight is
compensated Stoichiometrically by another step outside the extended
Krebs cycle, which produces the pyruvate from malate. The effect on the
overall scheme should be small.
The notation I have used may appear unnecessarily general. However,