to exclude the possible role of an admixture of nk , macrophages and t killer cells , contaminants were removed from suspensions of peritoneal tumour cells from syngeneic mice by adherence to plastic surfaces and separation on hypaque-ficoll , and from tumour cells grown in vivo or in vitro and then maintained in allogeneic animals by additional treatment with anti-h-2 sera and complement .
C0229671
sera
C0009498
complement