Assertion: polysaccharide antigen | /r/HasProperty | engulfed by b cellantigen
Facets:
Source sentences:
text: B cells differentiate into plasma cells to produce soluble antibodies Antigen is recognized and engulfed by B cellAntigen is processedProcessed antigen is presented on B cell surfaceB cell and T cell mutually activate each otherB cells differentiate into plasma cells to produce soluble antibodies