Fig. 1

Schematic illustration of the secondary structure of the RNA aptamer that strongly binds to HIV-1 Tat protein. U7 and U23 form two U-A-U base triple structures at the center of stem upon binding of Tat protein

Schematic illustration of the secondary structure of the RNA aptamer that strongly binds to HIV-1 Tat protein. U7 and U23 form two U-A-U base triple structures at the center of stem upon binding of Tat protein