<prompt> Raji cell assays are used to quantitateComplement levelImmune complexesT cellsInterferon level  <response>: Ref Robbins 9e p207 The Raji cell assay is an in vitro method for detecting complement fixing immune complexes in serum samples. The Raji cell is a lymphoblastoid cell with B-cell characteristics derived from a Burkitts lymphoma cell line. It has low affinity Fc receptors for binding immunoglobulin and high affinity receptors for binding complement 