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Peptide YY

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Peptide YY (PYY) is a short (36-amino acid) protein released by L-cells in the mucosa of the ileum and colon in response to feeding. In humans it appears to reduce appetite. Its actions are mediated by NPY receptors.

It is also known as Peptide Tyrosine Tyrosine, or Pancreatic Peptide YY3-36.