Electron transport chain
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An electron transport chain(ETC) couples a chemical reaction between an electron donor (such as NADH) and an electron acceptor (such as O2) to the transfer of H+ ions across a membrane, through a set of mediating biochemical reactions. These H+ ions are used to produce adenosine triphosphate (ATP), the main energy intermediate in living organisms, as they move back across the membrane. In mitochondria, it is the conversion of oxygen to water, NADH to NAD+ and succinate to fumarate that drives the transfer of H+ ions. Source: Wikipedia ([[wikipedia:Electron_transport_chain]])
电子传递链（ETC）将电子供体（如NADH）与电子受体（如O2）之间的化学反应与质子（H+）离子穿过膜的转移相结合，这一过程通过一系列介导的生化反应实现。这些质子离子在返回穿过膜的过程中，被用于生成腺苷三磷酸（ATP），这是生物体内主要的能量中介物质。在细胞线粒体中，氧气转化为水、NADH转化为NAD+以及琥珀酸转化为富马酸的过程推动着质子离子的转移。资料来源：维基百科（[wikipedia:Electron_transport_chain]）
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