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- W1226968936 abstract "This chapter describes the assay method, purification procedure, and properties of tryptophan hydroxylase. The assay depends on measuring the formation of 5- hydroxytryptophan colorimetrieally when tryptophan is incubated with resting cell suspensions of Chromobacterium violaceum. Chromobacterium violaceum is grown on a rotary shaker at room temperature in a medium of 0.4% glucose, 0.15% Difco yeast extract, 0.2% KH2PO4, and 0.02% MgSO4·7H2O. The pH of the medium is adjusted to 6.0 to 6.5. Paper chromatography showed that some 5-hydroxyindoleacetic acid is also formed. This organism does not decarboxylate 5-hydroxytryptophan.The enzyme system has not been solubilized, owing to its extreme instability. Hydroxylation of tryptophan appears specific, as the bacteria do not hydroxylate indole, tryptamine, indoleacetic acid, phenylalanine, kynurenine, or anthranilie acid. Although conversion of tryptophan to 5-hydroxyindole compounds is been demonstrated in mammals, including man, tryptophan hydroxylation I s not been demonstrated with tissue slices or homogenates." @default.
- W1226968936 created "2016-06-24" @default.
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- W1226968936 date "1962-01-01" @default.
- W1226968936 modified "2023-09-23" @default.
- W1226968936 title "[110b] Tryptophan hydroxylase" @default.
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- W1226968936 doi "https://doi.org/10.1016/s0076-6879(62)05319-7" @default.
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