Table 3.

Set of the 8 transformations of the nucleotides forming the dihedral group $D_8$. The first 4 transformations of the nucleotides form also the Klein V symmetry group. These are indicated as transformations in the rightmost column.

1.	(A)(T)(C)(G)	: A $\mapsto$ A; T $\mapsto$ T; C $\mapsto$ C; G $\mapsto$ G	Identity	(I)
2.	(AT)(CG)	: A $\mapsto$ T; T $\mapsto$ A; C $\mapsto$ G; G $\mapsto$ C	Strong/Weak	(SW)
3.	(AG)(CT)	: A $\mapsto$ G; G $\mapsto$ A; C $\mapsto$ T; T $\mapsto$ C	Purine/Pyrimidine	(YR)
4.	(AC)(GT)	: A $\mapsto$ C; C $\mapsto$ A; G $\mapsto$ T; T $\mapsto$ G	Keto/Amino	(KM)
5.	(A)(T)(CG)	: A $\mapsto$ A; T $\mapsto$ T; C $\mapsto$ G; G $\mapsto$ C
6.	(AT)(C)(G)	: A $\mapsto$ T; T $\mapsto$ A; C $\mapsto$ C; G $\mapsto$ G
7.	(ACTG)	: A $\mapsto$ C; C $\mapsto$ T; T $\mapsto$ G; G $\mapsto$ A
8.	(AGTC)	: A $\mapsto$ G; G $\mapsto$ T; T $\mapsto$ C; C $\mapsto$ A