Page 194 - Color Atlas of Biochemistry

Protein Metabolism 185

A. Symbiotic nitrogen fixation

Bacteroids 4 N A
Ferredoxin

N A
4

Fe-Protein 2 A PP P
[Fe S ]
4 4
per
Host cell e
2 A
P P
Air N 2 P
Root
nodule FeMo-Protein N 2
[Fe S ], [FeMoCo]
4 4
8 H
Iron-molyb-
denum
cofactor
H 2
Soil Nitrogenase 2 NH 3
Vascular bundle 1.18.6.1 Ammonia

B. Amino acid biosynthesis: overview

Serine family
Cysteine Glucose 6-
phosphate Ribose 5-
phosphate
Pentose phos-
3-Phospho- phate pathway
glycerate Erythrose
Glycine Serine Glyco- 4-phosphate
lysis
Phospho-
enolpyruvate
Pyruvate family Histidine
Valine * Alanine
*
Leucine
Pyruvate
Serine

Lysine * Asparagine

NH 3 Trypto- *
phan
* Oxalo- Tricarboxylic Phenyl- * Tyrosine
Threo- Aspar- acetate acid cycle
nine tate alanine

Synthesized from Aromatic
phenylalanine
2-Oxo- family
glutarat
Iso- *
leucine
Methionine * 2 NH 3 Ornithine

Aspartate family Urea cycle
Glutamine Glutamate
* Essential amino acid NH
Transamination 3
Proline Arginine
Reductive amination Glutamate family

Koolman, Color Atlas of Biochemistry, 2nd edition © 2005 Thieme
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