title: A growing family of natural killers.
abstract: The structure of the natural cytotoxicity receptor NKp44, described in this issue of Structure, adds to our rapidly expanding knowledge of the structure of natural killer cell receptors, which play a key role in the elimination of virally infected and tumor cells during innate immune responses.
authors.forename: Julie
authors.initials: J
authors.lastname: Dam
authors.forename: Roy A
authors.initials: RA
authors.lastname: Mariuzza
mesh_terms: D007694:Killer Cells, Natural / Q000378:metabolism; D008024:Ligands; D008285:Major Histocompatibility Complex; D008958:Models, Molecular; D005810:Multigene Family; D055629:Natural Cytotoxicity Triggering Receptor 2; D017434:Protein Structure, Tertiary; D011971:Receptors, Immunologic / Q000737:chemistry*
chemical_list: D008024:Ligands; C112837:NCR2 protein, human; D055629:Natural Cytotoxicity Triggering Receptor 2; D011971:Receptors, Immunologic