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Modular composition of the complex I. The different modules: N-module, Q-module, P- module (composed of ND1, ND2, ND4 and ND5) and acyl carrier protein (ACP) are shown superimposing the structure of bovine complex I. The matrix and intermembrane space (IMS) site of inner mitochondrial membrane are indicated. Adapted from Stroud et al. (2016).
