passages.id: split_1_test_3509_passage
passages.type: progene_text
passages.text: In the present study , we examined whether abrogation of NK-TR expression by retroviral infection of primary human or mouse NK cells with virus - producing antisense NK-TR also would demonstrate loss of non - MHC - restricted killing and whether the NK-TR was associated with KIR function in humans or with Ly-49 in the mouse .