passages.id: split_6_test_360_passage
passages.type: progene_text
passages.text: For the mouse UCP2 , the region near the transcription - initiation site lacked the typical TATA box , but was GC - rich , resulting in presence of several potential specificity protein 1 ( Sp-1 ) , activator protein ( AP ) - 1 and AP-2 binding sites .