A.1 Nucleotide Codes
We have included a list of accepted nucleotide replacement
combinations and their respective symbols. The symbols are commonly
found in output data from sequencing instruments. Table A-1 shows the complete set of nucleotide codes.
Table A-1. Nucleotide codes
|
G
|
G
|
Guanine
|
C
|
|
A
|
A
|
Adenine
|
T
|
|
T
|
T
|
Thymine
|
A
|
|
C
|
C
|
Cytosine
|
G
|
|
R
|
G or A
|
purine
|
Y
|
|
Y
|
T or C
|
pyrimidine
|
R
|
|
M
|
A or C
|
amino
|
K
|
|
K
|
G or T
|
keto
|
M
|
|
S
|
G or C
|
|
S
|
|
W
|
A or T
|
|
W
|
|
H
|
A or C or T
|
|
D
|
|
B
|
G or T or C
|
|
V
|
|
V
|
G or C or A
|
|
B
|
|
D
|
G or A or T
|
|
H
|
|
N
|
G or A or T or C
|
any nucleotide
|
N
|
|
