[Participation of phytohemagglutinin-transformed mouse lymphocytes in development of the "graft-versus-host" reaction]

Transformed lymphocytes obtained as a result of phytohemagglutinin-stimulation of the cells of the lymph nodes of the CBA mice were incapable of realizing the graft-versus-host reaction in administration to the sublethally irradiated (CBAXC57BL/6) F1 hybrids. In this case the graft-versus-host reaction is induced by small untransformed lymphocytes with the same concentration of surface antigens detected by the antilymphocytic serum as in the intact lymphocytes.