passages.id: split_1_test_1551_passage
passages.type: progene_text
passages.text: To define IL-13 and IL-4 responsive trans - acting elements , we identified a region ( DP2 : - 353 to - 304 bp site ) within the 15-LO-1 promoter ( by footprinting experiments ) to which IL-13 - responsive elements ( or factors ) bind specifically ( Kelavkar et al , 1998 , Mol Biol Rep 25 , 173 - 182 ) .