IUPAC codes for nucleotides
(Single-letter codes based on International Union of Pure and Applied Chemistry)The information is gathered from: http://www.iupac.org and http://www.ebi.ac.uk/2can/tutorials/aa.html.
Code | Description |
A | Adenine |
C | Cytosine |
G | Guanine |
T | Thymine |
U | Uracil |
R | Purine (A or G) |
Y | Pyrimidine (C, T, or U) |
M | C or A |
K | T, U, or G |
W | T, U, or A |
S | C or G |
B | C, T, U, or G (not A) |
D | A, T, U, or G (not C) |
H | A, T, U, or C (not G) |
V | A, C, or G (not T, not U) |
N | Any base (A, C, G, T, or U) |