passages.id: split_1_test_1555_passage
passages.type: progene_text
passages.text: Purification of nuclear protein extracts from IL-13 and IL-4 - stimulated A549 cells , using a DP2 core containing affinity column , identified a 150 kDa protein under non - denaturing conditions , and two , 70 and 85 kDa proteins under denaturing conditions .