Patent ID: 8053212

Claim:
A nucleoside analog selected from the group consisting of wherein X is independently selected from the group consisting of —H, —OH, —O-Me, —O-allyl, and —O-alkyl, M is independently selected from the group consisting of —H, —PO 3 H 2 , —P 2 O 6 H 3 , —P 3 O 9 H 4 and —PO 2 H(OR)—, and W is an electron withdrawing group independently selected from the group consisting of —NO 2 , —CN, —COOR′, and —CONHR′, wherein R is independently selected from the group consisting of —H, alkyl, and aryl, and R′ is selected from the group consisting of alkyl, aryl, a fluorescent moiety, and a moiety that binds to a metal ion.