Enables several functions, including chaperone binding activity; heat shock protein binding activity; and identical protein binding activity. Involved in several processes, including animal organ development; positive regulation of release of cytochrome c from mitochondria; and release of cytochrome c from mitochondria. Located in cytosol; membrane; and mitochondrion. Biomarker of intermittent claudication. Human ortholog(s) of this gene implicated in ataxia telangiectasia and cervix carcinoma. Orthologous to human BAK1 (BCL2 antagonist/killer 1). [provided by Alliance of Genome Resources, Apr 2022]