Protein L - 50nm Gold Conjugate

Gold nanoparticle core size: 50nm

Absorbance (lambda max.): 535nm

Optical density: Available at OD=3 and OD=10, select in product options

Conjugated protein: Recombinant Protein L, from P. magnus produced in E. coli

Working dilution: 1:5-1:100

Supplied in: 1XPBS (pH 7.4), 20% glycerol (v/v), 1% BSA


Suitable for use in immunoblotting, lateral flow assays, light microscopy, and electron microscopy applications. 

Advantages of Protein L Gold Conjugates

  • Sensitive probe for detection of human and mouse antibodies containing kappa light chains in samples such as serum, tissue culture media and ascites among others. 
  • Binds to a broader range of immunoglobulin classes than Protein A or Protein G. These include IgG, IgM, IgA, IgE and IgD.
  • Binds single-chain variable fragments (scFv) and Fab fragments that contain kappa light chains.
  • Does not bind goat or bovine IgG which makes it ideal for the specific detection of human and mouse antibodies produced in tissue culture medium containing Fetal Bovine Serum (FBS).


  • Store undiluted in storage buffer at 2-8 degree Celsius. Stable for 4 months if stored as specified.
  • Storage of conjugate at working dilution may result in performance loss.