Table 3.

GTP analogs, substituted group at the 2′ position and properties associated with these groups

S. No.	GTP analogs	Group at 2′ position	Property conferred
1	GTP	OH	3′-Endo conformation
2	dGTP	H	3′-Exo conformation
3	2′-F dGTP	F	3′-Endo conformation
4	2′-NH2 dGTP	NH2	Can accept and donate H-bond
5	2′-O-Me dGTP	O-CH3	Can accept H-bond but cannot transfer proton