Plays diverse functions in immunomodulation and oncogenicity, maybe by acting as a functional receptor for human CSF1. May inhibit interferon secretion from mononuclear cells. Exhibits oncogenic activity in vitro (By similarity). Homohexamer. Interacts with human CSF1 (By similarity). Massively secreted in the serum of EBV-induced nasophyryngeal carcinoma patients. Phosphorylated on serine and threonine by host.