We previously reported that human umbilical vein EC provide costimulatory signals to PHA-stimulated PBL via CD2 : lymphocyte function-associated Ag-3 and an unidentified ligand pair , resulting in a three- to eight-fold enhancement of IL-2 production .
we previously reported that human umbilical vein ec provide costimulatory signals to pha-stimulated pbl via cd2 : lymphocyte function-associated ag-3 and an unidentified ligand pair , resulting in a three- to eight-fold enhancement of il-2 production .
O O O O B-cell_type I-cell_type I-cell_type B-cell_type O O O O B-cell_type B-cell_type O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O O B-other_name I-other_name I-other_name O O O O O O O O O B-protein_molecule O O