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CD335, also known as NKp46, is a single-pass type I membrane protein of 46 kD. It belongs to the natural cytotoxicity receptor (NCR) family and contains two Ig-like (immunoglobulin-like) domains.
NKp46 expression is restricted to NK cells and a subset of NK-like T cells and is not expressed in CD1d-restricted NKT cells. NKp46 is a receptor for viral hemagglutinins and heparan sulfate proteoglycans and is involved in NK cell activation. |