Protein of unknown function; involved in the dual distribution of tail-anchored proteins such as Fis1p and Gem1p to mitochondria and peroxisomes; unstable protein that associates with the cytosolic face of the mitochondrial outer membrane; detected in highly purified mitochondria in high-throughput studies; contains a PH domain that impacts protein stability; binds phosphatidylinositols and phosphatidylethanolamine in a large-scale study