The following table lists the codes for oligonucleotide building blocks used by the BioPharma Finder application.
NOTE
The one-letter oligonucleotide building block codes are case-sensitive.
One-letter code | Building block |
|---|---|
Bases | |
A | adenine |
C | cytosine |
G | guanine |
T | thymine |
U | uracil |
I | inosine |
H | abase (loss of nucleobase) |
D | 5-methoxyuridine |
S | 5-methylcytosine |
N | 7-methylguanosine (m7G1) |
Backbone linkers | |
p | phosphate |
s | phosphorothioate |
t | triphosphate |
2'-ribose groups | |
d | deoxy (DNA) |
r | hydroxy (RNA) |
m | methoxy |
f | fluoro |
e | methoxyethyl |
5'-terminal groups | |
p | phosphate |
s | phosphorothioate |
b | biotin |
a | cAG |
u | cAU |
r | cARCA |
c | mCAP |
d | dimethoxytrityl (DMT) |
3'-terminal groups | |
p | phosphate |
s | phosphorothioate |
g | triantennary N-acetylgalactosamine (tri-GalNAc) |