The CpG island promoter region of the <i>MTHFR</i> gene.

<p>The CpG Island Searcher Program identified a CpG island within the <i>MTHFR</i> gene promoter region, downstream of the transcriptional start site. Arrow represents the transcriptional start site, blue line depicts the CpG island and the vertical bars represent a CpG site. Black lines and yellow lines represent the location of the MSP primers and BSP primers, respectively.