DNA ribonucleases that are active against intracellular hepatitis B viral RNA targets
Yasuhiro Asahina, Yoshinori Ito, Catherine H. Wu, George Y. Wu – 30 December 2003 – DNA ribonucleases directed against direct repeat 1 (DR1) and polyadenylation signal regions of hepatitis B virus (HBV) messages were prepared with phosphorothioate modifications and varying arm lengths. DNA ribonucleases modified throughout the entire molecule and in the target binding arms were completely protected from degradation after incubation with serum. DNA ribonuclease modified only at the 5′ and 3′ termini remained 92.9% intact after incubation.