The nitroxide binds and unbinds to the growing chain, protecting it from termination steps. Terminators are regions where transcription ends, and RNA Polymerase unbinds from DNA. Second, HDL unbinds from HL to activate HL enzymes in the blood. By lowering the pH levels in the venous capillaries, oxygen unbinds from blood hemoglobin. Odmar unbinds Alibech and declares Alibech his queen; she refuses.