histone methylation
... that histone methylation helps regulate gene expression by controlling whether DNA is exposed to proteins and transcription factors?
... that <b id="mwC4o"><a href="./Histone_methylation" id="mwC4s" rel="mw:WikiLink" title="Histone methylation">histone methylation</a></b> helps <a href="./Regulation_of_gene_expression" id="mwC4w" rel="mw:WikiLink" title="Regulation of gene expression">regulate gene expression</a> by controlling whether <a href="./DNA" id="mwC40" rel="mw:WikiLink" title="DNA">DNA</a> is exposed to <a class="mw-redirect" href="./Proteins" id="mwC44" rel="mw:WikiLink" title="Proteins">proteins</a> and <a href="./Transcription_factor" id="mwC48" rel="mw:WikiLink" title="Transcription factor">transcription factors</a>?