Pierce™ Biotinylated Recombinant Protein L can be used to probe and detect mouse and human antibodies containing kappa light chains in Western blotting, ELISA, IHC and other immunoassay protocols.

• Contains four immunoglobulin binding domains per protein
• Binds members of all classes of Ig that contain kappa light chains
• Binds single chain variable fragments (scFv) and Fab fragments that contain kappa light chains

Protein L is an immunoglobulin-binding protein that was originally derived from the bacteria Peptostreptococcus magnus, but is now produced recombinantly. Protein L has the unique ability to bind through kappa light chain interactions without interfering with an antibody's antigen binding site.