coenzyme Q biosynthesis Coq4 family protein / ubiquinone biosynthesis Coq4 family protein. Identical to Ubiquinone biosynthesis protein COQ4 homolog [Arabidopsis Thaliana] (GB:Q9ZPR0); similar to unnamed protein product [Vitis vinifera] (GB:CAO42506.1); contains InterPro domain Coenzyme Q biosynthesis Coq4 (InterPro:IPR007715)