Predicted to enable cytokine activity. Involved in several processes, including positive regulation of biosynthetic process; positive regulation of leukocyte migration; and regulation of defense response. Located in extracellular space. Used to study anti-basement membrane glomerulonephritis; autoimmune thyroiditis; and pelvic inflammatory disease. Biomarker of several diseases, including cerebrovascular disease (multiple); interstitial lung disease (multiple); irritant dermatitis; primary biliary cholangitis; and rhinitis (multiple). Human ortholog(s) of this gene implicated in several diseases, including asthma (multiple); autoimmune disease (multiple); hepatitis B; hepatitis C; and pancreatic cancer (multiple). Orthologous to human IL4 (interleukin 4). [provided by Alliance of Genome Resources, Apr 2022]