Enables arachidonate 5-lipoxygenase activity. Involved in several processes, including leukocyte migration; negative regulation of angiogenesis; and regulation of cellular response to stress. Acts upstream of or within leukotriene biosynthetic process and leukotriene production involved in inflammatory response. Located in cytoplasm and nucleus. Is expressed in duodenum epithelium and small intestine epithelium. Human ortholog(s) of this gene implicated in artery disease (multiple); asthma (multiple); pancreatic cancer; and pulmonary tuberculosis. Orthologous to human ALOX5 (arachidonate 5-lipoxygenase). [provided by Alliance of Genome Resources, Apr 2022]