Separation of serum antibody activities by anion-exchange cellulose chromatography.

Mumps, Histoplasma capsulatum. thyroglobulin, and typhoid H antibodies were found in fraction 1, which contained only gamma globulins with ultracentrifugal sedimentation coefficients of 6.6 Svedberg units (S).

The formation of myeloma protein by a mouse plasma cell tumor.

The origin of the myeloma protein found in mice bearing the plasma cell tumor X5563 has been investigated. Specific activity-time curves of the myeloma proteins isolated from the tumor and from the plasma of these animals were compared following intravenous injection of L-lysine-C(14). The results indicate that myeloma protein is synthesized in the plasma cell tumor.