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Oligonucleotide IUB-Codes (Codes of the International Union of Biochemistry)
Nucleotide-Bases: (for single bases)
| IUB |
Coding for |
| A |
Adenine |
| C |
Cytosine |
| G |
Guanine |
| T |
Thymine |
| U |
Uridine |
| I |
Inosine |
for mixed (wobble) bases:
|
IUB
|
Coding for |
IUB |
Coding for |
|
either of two bases possible |
any of three bases possible |
|
M |
A and C |
V |
A and G and C |
|
R |
A and G |
H |
A and C and T |
|
W |
A and T |
D |
A and G and T |
|
S |
G and C |
B |
G and T and C |
|
Y |
C and T |
any of four bases possible |
|
K |
G and T |
N |
A and G and C and T | | 
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