Predicted to enable signaling receptor binding activity. Predicted to be involved in T cell receptor signaling pathway and negative regulation of cytokine production. Predicted to act upstream of or within negative regulation of G1/S transition of mitotic cell cycle; negative regulation of signal transduction; and regulation of T cell activation. Predicted to be located in cell surface. Predicted to be active in external side of plasma membrane. Orthologous to several human genes including BTN2A2 (butyrophilin subfamily 2 member A2). [provided by Alliance of Genome Resources, Apr 2022]