szlak pentozofosforanowy - etap oksydacyjny.pdf

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MM16_PPP.pdf
PENTOSE PHOSPHATE PATHWAYS
(NADPH)
RIBOSE
PATHWAY I
1 Glucose-6- P
P -
1
P -
6
6 Glucose-6- P
5
5.3.1.9
5 Fructose-6- P
-
2
2
5
1
6 NADP +
2.7.1.11
ATP
1.1.1.49
ADP
P i
6 NADPH +6H +
P
3.1.3.11
O
X
I
D
T
I
V
E
Fructose-1,6-bis- P
1
H 2 O
P .
4.1.2.13
2
4.1.2.13
6 6- P -gluconolactone
2
6
2 Glyceraldehyde-3- P
6 H 2 O
2
3.1.1.17
2.2.1.1
P
2 Erythrose-4- P
P .
2
2
A
T
H
W
Y
6 6- P -Gluconate
2.2.1.2
P -
6
6 NADP +
6CO 2
4 Xylulose-5- P
1.1.1.44
2
6 NADPH +6H +
P - O C H
2 Glyceraldehyde-3- P
2
2
P -
4
P
P -
2
6 Ribulose-5-P
2
2 Ribose-5- P
2
2 Sedoheptulose-7- P
2.2.1.1
6
5.3.1.6
6 Ribose-5- P
4
2
Nucleotides &
Nucleic Acids
PATHWAY I (OXIDATIVE) PATHWAYS II and III
Cell requires BOTH NADH and RIBOSE
Inter- and intra -molecular rearrangements between
3, 4, 5, 6, and 7-carbon sugars, result in the conversion
of 5 hexoses into 6 pentoses - and vice versa
i.e. 5 Glucose-6- P 6 Ribose-5- P
This makes possible the two other Pathways (II and III) in which
either NADPH or Ribose - but not both - are produced.
P
P
P
P
NADPH
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