It’s been over 30 years since the identification and commercialization of protein A. Since its inception, protein A has served as the pinnacle purification platform for the immunoglobulin G (IgG) subclass of antibodies, both monoclonal and polyclonal forms. The introduction of protein A paved the way for researchers and large pharmaceutical manufacturers to develop and commercialize IgG-based therapeutics at both small and large scales, provided by its relative ease of use and well-characterized chromatographic attributes. Unfortunately, the gold standard affinity…