Table 1 Equivalences between alphabet symbols and nucleotides

A

A

T

[A]denine

B

C | G | T

V

Any but Adenine

C

C

G

[C]ytosine

D

A | G | T

H

Any but Cytosine

G

G

C

[G]uanine

H

A | C | T

D

Any but Guanine

K

G | T

M

[K]eto

M

A | C

K

A[M]ino

N

A | C | G | T

N

A[N]y nucleotide

R

A | G

Y

Pu[R]ine

S

C | G

S

[S]trong (3 H-bonds)

T

T

A

[T]hymine

V

A | C | G

B

Any but Thymine

W

A | T

W

[W]eak (2 H-bonds)

Y

C | T

R

P[Y]rimidine