Acts upstream of or within angiogenesis. Predicted to be located in mitochondrial inner membrane. Predicted to be part of respiratory chain complex III. Is expressed in several structures, including adaxial cell; alar plate midbrain region; digestive system; optic tectum; and pronephric duct. Human ortholog(s) of this gene implicated in inherited metabolic disorder and mitochondrial complex III deficiency nuclear type 3. Orthologous to human UQCRB (ubiquinol-cytochrome c reductase binding protein).