title: Natural cytotoxic activity of sipunculid leukocytes on allogenic and xenogenic erythrocytes.
mesh_terms: D000818:Animals; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic; D004912:Erythrocytes / Q000276:immunology; D007448:Invertebrates / Q000276:immunology*; D008214:Lymphocytes / Q000276:immunology*; D013045:Species Specificity