Predicted to enable signaling receptor binding activity. Acts upstream of or within innate immune response. Located in extracellular space. Human ortholog(s) of this gene implicated in cryoglobulinemia; hepatitis C; liver cirrhosis; and thrombocytopenia. Orthologous to human IFNL2 (interferon lambda 2) and IFNL3 (interferon lambda 3). [provided by Alliance of Genome Resources, Apr 2022]