Oxidative Phosphorylation

graph TD A[NADH] --> B[Complex I] C[FADH2] --> D[Complex II] B --> E[Ubiquinone Pool] D --> E E --> F[Complex III] F --> G[Cytochrome c] G --> H[Complex IV] H --> I[O2 → H2O] B --> J[Proton Pumping] F --> J H --> J J --> K[Proton Gradient] K --> L[ATP Synthase] L --> M[ADP + Pi → ATP] M --> N[ATP Product] style A fill:#ff6b6b,color:#fff style C fill:#ff6b6b,color:#fff style B fill:#51cf66,color:#fff style D fill:#51cf66,color:#fff style E fill:#74c0fc,color:#fff style F fill:#51cf66,color:#fff style G fill:#74c0fc,color:#fff style H fill:#51cf66,color:#fff style I fill:#b197fc,color:#fff style J fill:#51cf66,color:#fff style K fill:#74c0fc,color:#fff style L fill:#ffd43b,color:#000 style M fill:#51cf66,color:#fff style N fill:#b197fc,color:#fff