passages.id: split_6_test_358_passage
passages.type: progene_text
passages.text: To identify cis - acting regulatory elements controlling this gene 's expression , we cloned an approx. 6.2 - kb region upstream from the translation - initiation site of the mouse UCP2 gene and analysed its transcription activity using chimaeric mouse UCP2 promoter - placental-alkaline-phosphatase ( PLAP ) reporter - gene constructs .