Protein G is a monomeric protein lacking cysteine residues. Recombinant Protein G is a highly stable surface receptor that is capable of binding the Fc portion of immunoglobulins, especially IgGs from a large number of species.

• Freely soluble in water and standard buffers
• Extinction coefficient: E1% 280=~9,5
• Particle size 31 kDa

Protein G contains two IgG-binding B regions, binds both Fc and Fab fragments of IgG. Does not cross-react with human albumin. It can be used with immunologically active enzyme conjugates, ELISA, dot blot and Western Blot techniques, immunoprecipitation, and affinity purification of polyclonal and monoclonal antibodies. Colloidal gold conjugated protein G is suitable for electron microscopy application.