Preface; 1. Introduction to biopharmaceutical processes; 2. Fundamentals of protein chromatography; 3. Counter-current separation processes; 4. Counter-current chromatography for the capture step; 5. Counter-current chromatography for the polishing steps; 6. Protein conjugation; 7. Protein aggregation in biopharmaceutical processes; 8. Conclusion; References; Notation; Index.