Page 114 - Color Atlas of Biochemistry

Enzymes 105

A. Coenzymes: definitions
Substrate 1 Coenzyme Group Substrate 2 Coenzyme
1. (form 1) transfer (form 2)

a b c d
Prosthetic Prosthetic
group (form1) Substrate 1 Substrate 2 group (form 2)
2.

B. Redox coenzymes

Coenzyme Oxidized form Reduced form Type Trans- E ol
ferred (V)
1. NAD(P) O L H –0.32
H H H H
H C N
NH 2 N C
N A N A C N
H N H O O H C
H O N C C
CH 2 OP O P O CH 2 N
H C O O
N A N A O O
NH 2
H H H H
P P H H H H
H N H
ox. red. OH OH OH OH
2. Flavin O H H O P 2[H] –0.3
mononucleotide H 3 C N C H 3 C C N C H to
(FMN) NH C C N +0.2
C C C C
H 3 C N N O H 3 C C N N O
H CH 2 H
H C OH
F F
H C OH
Ribitol (Rit)
ox. red. H C OH O
C O P O
H 2
O
3.Flavin H O P 2[H] –0.3
adenine H 3 C N C H N H to
dinucleotide NH +0.2
(FAD) C N C C N
H 3 C N N O H C
C C
H O O N N
O
F A F A
H 3 C N C Ribitol OP O P O CH 2 O
NH
ox. red. O O H H
C
H 3 C N N O H H
OH OH
4. Ubiquinone O OH L 2[H] –0
(coenzym Q) to
H 3 CO CH 3 H 3 CO CH 3
OH +0.2
H 3 CO H 3 CO H
O OH CH 3
OH 6–10
5. Ascorbic O O HO O L 2[H] +0.1
acid
O O
O HO
HO C H HO C H
CH 2 OH CH 2 OH

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