Standard ambiguity codes

From NMPDR Wiki

The standard ambiguity codes can be used to represent sets of possible values in a DNA sequence.

Code	Nucleotides
M	{A, C}
R	{A, G}
W	{A, T}
S	{C, G}
Y	{C, T}
K	{G, T}
V	{A, C, G}
H	{A, C, T}
D	{A, G, T}
B	{C, G, T}
N	{A, C, G, T}