Receptor which shows binding specificity for the cytokine ifng1 (interferon gamma 1). Highly expressed in brain. Also detected in spleen, heart, intestine, gill and kidney. In immune cell populations, detected at low levels in monocytes, peripheral blood leukocytes, splenocytes, neutrophils and mature macrophages. Up-regulated in response to ifng1 (interferon gamma 1) and tnfb (TNF-alpha 2). Belongs to the type II cytokine receptor family.