Binding of a DNA fragment ( 1003 987 ) containing a DR1 response element from __SP__ __NODE__ gene in a nuclear fraction from confluent differentiated 3T3 F442A cells and __NODE__ protein in a nuclear fraction from confluent differentiated 3T3 F442A cells is the same as binding of a DNA fragment ( 1003 987 ) containing a DR1 response element from __SP__ __NODE__ gene in a nuclear fraction from confluent predifferentiated 3T3 F442A cells and __NODE__ protein in a nuclear fraction from confluent predifferentiated 3T3 F442A cells .