passages.id: split_8_test_754_passage
passages.type: progene_text
passages.text: In electrophoretic mobility shift assays using the E1 oligonucleotide as probe , nuclear extracts from unstimulated T and B cell lines formed a constitutive complex termed complex I , while nuclear extracts from stimulated SCM-1 - producer T cell lines formed a higher mobility complex termed complex II with a concomitant decrease in complex I .