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Reference.org
PHO
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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Pho4/fScpBYMK">Pho4</a>, a basic helix-loop-helix transcription factor</li> <li><i><a href="/facts/Phos/NGgpyaum">Phos</a></i>, a genus of sea snails</li></ul>