These abbreviations for nucleic acids and amino acids can be used
when searching most molecular databases.
IUB | Meaning |
A | Adenosine |
C | Cytidine |
G | Guanine |
T | Thymidine |
U | Uridine |
R | G or A (either purine) |
Y | A or T (either pyrimidine) |
K | G or T (Keto) |
M | A or C (Amino) |
S | G or C (Strong) |
W | A or T (Weak) |
B | C G or T |
D | A G or T |
H | A C or T |
V | A C or G |
N | A C G or T (any nucleotide) |
Author: Andrew Louka
Modified by: William Barnes