single-letter base code

CODE

NUCLEOTIDE SET

INTERPRETATION

A

A

ADENINE

T

T

THYMIDINE

G

G

GUANINE

C

C

CYTOSINE

W

A, T

WEAK -BOND

R

A, G

PURINE

M

A, C

AMINO GROUP

K

T, G

KETO GROUP

Y

T, C

PYRIMIDINE

S

G, S

STRONG -BOND

B

T, G, C

NON-ADENINE

V

A, G, C

NON-THYMIDINE

H

A, T, C

NON-GYANINE

D

A, T, G

NON-CYTOSINE

N

A, T, G, C

ANY NUCLEOTIDE

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