Chapter 1. Introduction: Protein Oligomerization and the Formation of Macromolecular Assemblies,- Chapter 2. Antibody complexes.- Chapter 3. Unravelling ribosome function through structural studies.- Chapter 4. Competence Functions and mechanisms of the human ribosome-translocon complex.- Chapter 5. The Structures of Eukaryotic Transcription Pre-Initiation Complexes and Their Functional Implications.- Chapter 6. Regulation of Antiviral Innate Immunity Through APOBEC Ribonucleoprotein Complexes.- Chapter 7. Structure and Function of the AAA+ ATPase p97, a Key Player in Protein Homeostasis.- Chapter 8. Penicillin-Binding Proteins (PBPs) and bacterial cell wall elongation complexes.- Chapter 9. Structure and function of Roundabout receptors.- Chapter 10. Structure and function of molecular chaperones that govern immune peptide loading.- Chapter 11. Biology and Biochemistry of Bacterial Proteasomes.- Chapter 12. The Kai-protein clock - keeping track of cyanobacteria's daily life.- Chapter 13. Frataxin Structure and Function.- Chapter 14. Crystallins and their complexes.- Chapter 15. Structure and Function of the TREX-2 Complex.- Chapter 16. Amyloid Oligomers, Protofibrils and Fibrils.- Chapter 17. CAD, a multienzymatic protein at the head of de novo pyrimidine biosynthesis.- Chapter 18. The Anaphase Promoting Complex/Cyclosome (APC/C): a versatile E3 ubiquitin ligase.- Chapter 19. TRiC/CCT Chaperonin: Structure and Function.