Nucleotide Codes (Derived from IUPAC)

Code	Meaning
A	A:A
C	C:C
G	G:G
T	T:T
R	A:G
Y	C:T
S	C:G
W	A:T
K	G:T
M	A:C
+	+:+ (insertion homozygous)
0	+:-
-	-:- (deletion homozygous)
N	Unknown