Page 94 - Color Atlas of Biochemistry

Nucleic Acids 85

A. DNA: structure

5' 3'
H
H
N
C H O P O
H C O 3.4 nm
O C C N C N O
N H C C H
C N G CH
C N O 2 C G
O C
O H N N A T
H C
2
H
O
H O
O P O H O CH
H N N 3 O P O 0.34 nm
O C C C
C C O
N C A N H N T C H CH
N C C N O 2
O O
H C H
2
Minor Major
O OH CH OH groove groove
2
O O
O P O
2'-deoxy- H H
D-ribose
H 2 H 5' 3'
H OH
1. Formula 2. Double strand

B. Coding of genetic information

C
3' 5' 3' 3'
C
Codon
(triplet) T Phe
T

Sense strand C
(+) strand, A Tyr
“coding strand” T
T
C Ala
G
T
C Thr
A
A
Template A Glu
strand G
(–) strand, A
“codogenic A
strand” Glu
G
G
T Met
A
5' N

1. 2. 3.

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