Cytokines in Endocrine Dysfunction of Plasma Cell Disorders

Figure 1

Immunoblot of the serum protein electrophoresis (sPEP) in the reported case. The red square indicates the identification of a low-level monoclonal protein IgA-λ using immunoblot of the sPEP. Its presence went unperceived in routine sPEP due to its very limited quantity masked by the dominant presence of beta-2-globulins. Fixation was performed at a 1/50 serum dilution. The labels below each track indicate the antibody used to reveal the Ig (from left to right): κ—light chain kappa, λ—light chain lambda, and α—heavy chain alpha (IgA).