st noncoding RNA (ncRNA) triggers X inactivation by coating the X chromosome that produces it and by recruiting enzymes that mediate Barr body rmation. How one X chromosome is chosen to express Xist is unknown. Active X Į Histone modifying proteins ~Xist ncRNA XIC Histone methyltransferase (HMT) Histone acetyl transferase (HAT) Histone deacetylase (HDAC) DNA methyltransferase (DNMT) Inactive X Xist hich of these enzymes is unlikely to be recruited by Xist?

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.