A proton transfer is a chemical process where a proton (H⁺) moves from one molecule to another. This transfer is crucial in many chemical reactions, especially in acid-base reactions, where acids donate protons and bases accept them. The movement of protons can influence the structure and reactivity of molecules, playing a vital role in biological systems and chemical processes. In biological systems, proton transfers are essential for processes like cellular respiration and photosynthesis. Enzymes often facilitate these transfers, helping to convert energy and maintain pH levels in cells. Understanding proton transfers is important for fields like biochemistry and pharmacology, as they impact how drugs interact with biological targets.