passages.id: split_1_test_2620_passage
passages.type: progene_text
passages.text: Electrophoretic mobility shift assays using a probe containing two putative STAT - binding sequences located at - 1085 and - 1059 in the human perforin gene showed that STAT4 or STAT5 activated by IL-12 or IL-2 , respectively , in NKL cells binds this region .