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Hydroxyquinaldic acid

In mammals, birds, insects, and some plants, compounds of the kynurenic acid group are end products of tryptophan metabolism. They are either excreted with the urine (E 1) or are accumulated in the organism. 8-Hydroxyquinaldic acid methyl ester is a feeding deterrent and aseptic of certain water beetles (E 5.1). [Pg.406]

Quinoline derivatives 8-Hydroxyquinaldic acid methyl ester (D 21.5) Synthesized in glands of the water beetle Ilybius fenestratus, feeding deterrent, antiseptic... [Pg.509]

Most of the kynurenine formed is, however, hydroxylated to xanthurenic acid and 8-hydroxyquinaldic acid. The enzyme kynureninase yields from 3-hydroxykynurenine 3-hydroxyanthranilic acid, which is then degraded via the glutarate pathway. [Pg.321]

Fic. 1. Metabolism of tryptophan to serotonin (5-hydroxytryptamine) and niacin. Fyiidoxal phosphate (PLP) dependent reactions are indicated. Reactions not shown which may result in formation of products excreted in urine include the acetylation of liymuenine and 3-hydroxykynurenine, conjugation of anthranilic acid with glycine (to form o-aminohippuric acid) and with glucuronic acid, and the dehydroxylation of kynurenic acid and xanthurenic add to quinaldic add and 8-hydroxyquinaldic add, respectively. [Pg.265]

See other pages where Hydroxyquinaldic acid is mentioned: [Pg.633]    [Pg.65]    [Pg.130]    [Pg.991]    [Pg.406]    [Pg.322]    [Pg.633]    [Pg.633]    [Pg.649]    [Pg.649]    [Pg.673]    [Pg.65]    [Pg.130]    [Pg.839]    [Pg.991]    [Pg.406]    [Pg.322]   
See also in sourсe #XX -- [ Pg.26 , Pg.991 ]

See also in sourсe #XX -- [ Pg.321 , Pg.322 ]



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