Heparin Precipitability of the Macroglobulin in a Patient with Waldenström's Macroglobulinemia

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Abstract
The macroglobulin isolated from a patient with macroglobulinemia was shown to be specifically precipitable by heparin. Maximal precipitation occurred at relatively low (by weight) concentrations of heparin and persisted over a broad range of heparin concentration. The possible clinical significance of the finding has been briefly discussed.