Bence Jones protein
![A crystal of Bence Jones protein.](/Images/godic/202412/24/Bence_Jones_Protein_MLE10447.jpg")
A Bence Jones protein is a monoclonal globulin protein or immunoglobulin light chain found in the urine, with a molecular weight of 22-24 kDa. Detection of Bence Jones protein may be suggestive of multiple myeloma or Waldenström's macroglobulinemia.