Protein A-derived affinity ligands against the COVID-19 spike protein coupled to chromatography beads can resolve purification challenges in the development of coronavirus vaccines, say Navigo and Repligen. Bringing a vaccine against COVID-19 to market involves numerous challenges, not least on the manufacturing side. In downstream processing (DSP), the speed of purification and the yield of the purified product are key to ensuring supply of a quality vaccine. As such, bioprocess technology firm Repligen teamed with protein engineering firm Navigo Proteins…