Ready-to-use ELISA kits are available for the detection of coenzyme Q3 methyltransferase, an alias of the protein, coenzyme Q3, methyltransferase. The official gene symbol is COQ3. The protein, with a mass of 41.1 kDa and length of 369 residues, is reported to be mitochondrial. It is a member of the Class I-like SAM-binding methyltransferase superfamily, UbiG/COQ3 family and may be known by other names, including: DHHB methyltransferase, 3-demethylubiquinone-10 3-methyltransferase, 3,4-dihydroxy-5-hexaprenylbenzoate methyltransferase, 2-polyprenyl-6-hydroxyphenyl methylase, 2-polyprenyl-6-hydroxyphenol methylase, and coenzyme Q3 homolog methyltransferase.