Norrin

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** Norrin (133 aa, ~15 kDa) is encoded by the human NDP gene. This protein plays a role in the development of the retina and frizzled-4-dependent activation of the Wnt signaling pathway.

**Synonyms:** - NDP - Norrie Disease Protein - X-Linked Exudative Vitreoretinopathy 2 Protein