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Reference.org
PHOX2B
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<p>Paired-like homeobox 2b (PHOX2B), also known as neuroblastoma Phox (NBPhox), is a <a href="/facts/Protein/Jxmagu3E">protein</a> that in humans is encoded by the PHOX2B <a href="/facts/Gene/e1swwPY6">gene</a> located on <a href="/facts/Chromosome_4_(human)/B4lT0YrJ">chromosome 4</a>. </p><p>It codes for a <a href="/facts/Homeodomain/bpvuuw3v">homeodomain</a> transcription factor. It is expressed exclusively in the nervous system, in most neurons that control the viscera (cardiovascular, digestive and respiratory systems). It is also required for their differentiation. </p>