Rabbit IgG Beads 4FF is an affinity medium for rapid and convenient single step purification of protein A fusion protein. Rabbit IgG is coupled to highly cross-linked 4% agarose beads. The coupling technique is optimized to give a high binding capacity for IgG. This binding capacity , together with the excellent kinetic and flow properties of the highly cross-linked beads,makes the product suitable for large-scale purification.