rSPA –Native Recombinant Staphylococcal Protein A Ligand – is the most advanced non-mutant Protein A ligand available from Repligen. The combination of performance and purity to native Protein A and outstanding economics and supply chain security, makes rSPA the automatic first choice for all new Protein A ligand applications.

• Contains the same amino acid sequence and molecular mass as the native Protein A sourced from S. aureus
• Manufactured with animal-free materials