COQ9
Ubiquinone biosynthesis protein COQ9, mitochondrial, also known as coenzyme Q9 homolog (COQ9), is a protein that in humans is encoded by the "COQ9" gene. Function. This locus represents a mitochondrial ubiquinone biosynthesis gene. The encoded protein is likely necessary for biosynthesis of coenzyme Q10, as mutations at this locus have been associated with autosomal-recessive neonatal-onset primary coenzyme Q10 deficiency. Clinical significance. It may be associated with Coenzyme Q10 deficiency. Model organisms. Model organisms have been used in the study of COQ9 function. A conditional knockout mouse line, called "Coq9" was generated as part of the International Knockout  Mouse Consortium program — a high-throughput mutagenesis project to generate and distribute animal models of disease to interested scientists. Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion. Twenty two tests were carried out on homozygous mutant mice and one significant abnormality was observed: females displayed hyperactivity in an open field test.