peripheral blood lymphoid cells ( pbl ) from cancer patients and normal donors were tested against three melanoma cell lines grown in either 10 % fetal calf serum ( fcs ) or 2.5-5 % human ab serum in order to determine if the heterologous membrane ( hm ) antigen or other fcs antigens acquired from the bovine serum supplement could influence lymphoid cell-mediated cytotoxicity in vitro .
C0003333
heterologous
C0003320
antigens