Styk1 is specifically expressed in NK1.1(+) lymphocytes including NK, γδ T, and iNKT cells in mice, but is dispensable for their ontogeny and function.
Wilharm A, Sandrock I, Marotel M, Demera A, Naumann R, Walzer T, Prinz I. Eur J Immunol. 2019 May; 49(5):686-693. Epub 2019 Feb 18.