Question: What is detected by the HVA metabolite, produced by the organic chemical of the catecholamine and phenethylamine families?
Sentence (from "Homovanillic acid"): Homovanillic acid (HVA) is a major catecholamine metabolite that is produced by a consecutive action of monoamine oxidase and catechol-O-methyltransferase on dopamine.
Relevant evidence: No