7-(Benzofuran-2-yl)-7-deazadeoxyguanosine as a fluorescence turn-ON probe for single-strand DNA binding protein.

7-(Benzofuran-2-yl)-7-deazadeoxyguanosine ((BF)dG) was synthesized and incorporated into an oligodeoxynucleotide (ODN). The single-stranded ODN containing (BF)dG shows 91-fold fluorescence enhancement upon binding of single-strand DNA binding protein.