A | A | Adenine |
C | C | Cytosine |
G | G | Guanine |
T | T | Thymine |
R | A or G | puRine |
Y | C or T | pYrimidine |
W | A or T | Weak hydrogen bonding |
S | C or G | Strong hydrogen bonding |
M | A or C | aMino group at common position |
K | G or T | Keto group at common position |
B | C, G or T | not A |
D | A, G or T | not C |
H | A, C or T | not G |
V | A, C or G | not T |
N | A, C, G or T | aNy |