Abstract: The present disclosure relates to the field of chromatography, and more specifically to novel affinity ligands and affinity agents which are suitable for use in isolation of antibody and antibody fragments that contain the heavy chain first constant region (CHI). The disclosure encompasses affinity ligands as such, chromatography separation matrices (affinity agents) comprising an affinity ligand according to the disclosure, and a process of isolating antibodies, especially IgGs, and CHI-containing antibody fragments thereof using an affinity ligand according to the disclosure. Methods of making the affinity ligands and separation matrices are also provided.

Abstract: Provided herein are affinity agents comprising ligands that specifically bind adeno-associated virus. The affinity agents are useful for binding, isolation, and/or purification of adeno-associated virus. Further disclosed are amino acid sequences of binding motifs or polypeptides comprised by the ligands, and associated modifications of the binding motifs and/or polypeptides, as well as a method of making the affinity agents.