Electron Transport Chain (ETC).

A. Standard model of ETC where electrons are shuttled from one complex to the next through diffusion of the intermediate electron carriers (ECs). B. Random walk diffusion of ECs in the random collision model. C. Supercomplex model of the ETC. The complexes of the ETC are assembled together into a super structure which reduces the diffusion time of the intermediate ECs by providing a direct conduit for electron transfer.A. 电子传递链（Electron Transport Chain, ETC）的标准模型：电子借助中间电子载体（intermediate electron carriers, ECs）的扩散作用，从一个复合物穿梭传递至下一个复合物。B. 随机碰撞模型中，中间电子载体呈现随机游走扩散行为。C. 电子传递链的超复合物模型：电子传递链的各复合物组装形成超结构，通过提供直接的电子传递通道，缩短了中间电子载体的扩散耗时。