IUPAC codes

The IUPAC Code is a set of symbols encoding each subset of the four nucleotides. Here is the complete list of these symbols together with the subsets they encode.

Code	Corresponding class	Name
A	-	Adenine
C	-	Cytosine
G	-	Guanine
T	-	Thymine
U	-	Uracil
R	[GA]	purine
Y	[TC]	Pyrimidine
K	[GT]	Keto
M	[AC]	Amino
S	[GC]	?
W	[AT]	?
B	[GTC]	?
D	[GAT]	?
H	[ACT]	?
V	[GCA]	?
N	[ACGT]	Any

Gregory Kucherov

Last modified: Wed Jul 26 15:38:31 MEST 2000