Probing Electrostatics in a DNA Repair Enzyme with a pH-Sensitive Nitroxyl Spin Label. - Ovcherenko SS; Bulgakov NA; Litvinov IA; Shernyukov AV; Kuznetsov DA; Endutkin AV; Zharkov TD; Kupryushkin MS; Kirilyuk IA; Zharkov DO; Bagryanskaya EG (The journal of physical chemistry. B, 2026)