passages.id: split_4_test_3584_passage
passages.type: progene_text
passages.text: We have compared the binding to HLA-Cw7 of an inhibitory p58 molecule , NKAT2 , the highly homologous activating p50 molecule , clone 49 , and a second activating p50 molecule , clone 39 , which has homologies to both NKAT1 and NKAT2 .