Monoclonal gammopathy on immunofixation

This figure shows the serum protein electrophoretic pattern (SPEP) and immunofixation pattern of a single serum sample with antisera to heavy chain determinants of IgG, IgA, and IgM, and to kappa and lambda light chains. It shows a discrete band on SPEP (red asterisk) and a band with similar mobility reacting only with the antisera to IgG (blue asterisk) and the kappa light chain (black asterisk), indicative of an IgG kappa monoclonal protein.