chapter 1. Multi-electron transfer in biological systems / Catarina M. Paquete, Bruno M. Fonseca and Ricardo O. Louro -- chapter 2. Diversity of interactions in redox systems : from short- to long-lived complexes / Antonio Diaz-Quintana, Isabel Cruz-Gallardo, Miguel A. de la Rosa and Irene Diaz-Moreno -- chapter 3. ATPases and mitochondrial supercomplexes / Sara Cogliati, Rebeca Acin-Perez and Jose A. Enriquez -- chapter 4. Role of cardiolipin in mitochondrial supercomplex assembly / Eugenia Mileykovskaya and William Dowhan -- chapter 5. Mitochondrial supercomplexes and ROS regulation : implications for ageing / Maria L. Genova and Giorgio Lenaz -- chapter 6. Mitochondrial respiratory supercomplexes in physiology and diseases / Anna M. Ghelli, Valentina C. Tropeano and Michela Rugolo -- chapter 7. Regulation of photosynthetic electron transport via supercomplex formation in the thylakoid membrane / Kentaro Ifuku and Toshiharu Shikanai -- chapter 8. Microbial redox proteins and protein complexes for extracellular respiration / Liang Shi, Ming Tien, James K. Fredrickson, John M. Zachara and Kevin M. Rosso -- chapter 9. Unravelling new metabolic pathways : supramolecular organisation of aerobic bacteria respiratory chains / Ana M.P. Melo, Emma B. Gutierrez-Cirlos and Miguel Teixeira -- chapter 10. Membrane organisation and electron transport switches in cyanobacteria / Conrad W. Mullineaux and Tchern Lenn -- chapter 11. Regulation of cellular signalling by thioredoxin / Toshiya Machida, Hidenori Ichijo and Isao Naguro -- chapter 12. Cytochrome c-based signalosome / Katiuska Gonzalez-Arzola, Blas Moreno-Beltran, Jonathan Martinez-Fabregas, Miguel A. de la Rosa and Irene Diaz-Moreno -- chapter 13. Cell membrane raft redox signalosomes : platform responding to danger signals / Pin-Lan Li, Justine M. Abais, Jun-Xiang Bao and Yang Zhang -- chapter 14. Conclusion / Irene Diaz-Moreno and Ricardo O. Louro.