since these agents had no direct effect on other hematopoietic tumor types ( myeloma , t-lymphoma , mastocytoma ) at the same or up to 10 ( 4 ) higher concentrations , it is proposed that the sensitive tumors retain specific receptors for immunostimulants , either at the cell surface or within the cell in the case of phagocytosable particles .
C0699040
cell surface
C0007634
cell