The mouse <i>IDE</i> promoter contains a CpG island and has dispersed transcription initiation sites.

<p>(<b>A</b>) Representation of the mouse <i>IDE</i> promoter. The dashed line indicates the unknown region which was cloned and sequenced in this study. The mouse <i>IDE</i> promoter contains a CpG island with a length of approximately 1300 bp. (<b>B</b>) The transcription initiation sites of mouse <i>IDE</i>. The frequency of transcription initiation from different sites is shown. The mouse <i>IDE</i> promoter has dispersed transcription initiation sites located within a window of 62 bp. The first transcription initiation site is underlined.