homogentisic acid(redirected from Melanic acid)
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ho·mo·gen·tis·ic ac·id(hō'mō-jen-tis'ik as'id),
Glycosuric acid; (2,5-dihydroxyphenyl)acetic acid; an intermediate in l-phenylalanine and l-tyrosine catabolism; if made alkaline, it oxidizes rapidly in air to a quinone that polymerizes to a melaninlike material; elevated levels are observed in patients with alcaptonuria.
homogentisic acid/ho·mo·gen·tis·ic ac·id/ (ho″mo-jen-tis´ik) an aromatic hydrocarbon formed as an intermediate in the metabolism of tyrosine and phenylalanine and accumulated and excreted in the urine in alkaptonuria.
An intermediate of the metabolic breakdown of tyrosine and phenylalanine; it occurs in the urine in cases of alkaptonuria.
a compound that is an intermediate product of the metabolism of tyrosine. It forms a melanin-like staining substance in the urine of people who have alkaptonuria.