Ninety macroglobulinaemia sera were tested for occurrence of multiple monoclonal immunoglobulins. Thirteen (14%) of the sera contained more than one monoclonal immunoglobulin. The homogeneous macroglobulins were isolated from 3 sera; in each case individually specific antigenic determinants common to the two components were demonstrated, in addition to determinants unique for each component. NH 2 ‐terminal amino acid sequence studies in two patients showed that the IgM heterogeneity was due to differences in the primary structure of the variable parts of the μ (case Tö) and the μ (case æ) chains. Macroglobulinaemia appears to be a unique source of homogeneous immunoglobulins from related clones.
No takes yet. Share an insight, caveat, or question.
Harboe et al. (1972) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: