Enables enzyme binding activity. Involved in several processes, including mitochondrial electron transport, cytochrome c to oxygen; negative regulation of hydrogen peroxide biosynthetic process; and response to ischemia. Located in cytosol and mitochondrion. Human ortholog(s) of this gene implicated in cholangiocarcinoma; lung non-small cell carcinoma; pancreatic cancer; and thrombocytopenia. Orthologous to human CYCS (cytochrome c, somatic). [provided by Alliance of Genome Resources, Apr 2022]