Code	Represents
A	Adenine
C	Cytosine
G	Guanine
T	Thymine
Y	Pyrimidine (C or T)
R	Purine (A or G)
W	weak (A or T)
S	strong (G or C)
K	keto (T or G)
M	amino (C or A)
D	A, G, T
D	A, C, G
V	A, C, G
H	A, C, T
B	C, G, T
X/N	A, C, G, T
-	Gap