| 4-pyridoxic acid | The principal product of the metabolism of pyridoxal (-COOH replaces -CHO at position 4), appearing in the urine. (05 Mar 2000) |
|---|---|
| 4-pyridoxic acid dehydrogenase | <enzyme> From membrane of pseudomonas ma-1; forms 2-methyl-3-hydroxy-5-formylpyridine-4-carboxylic acid; 2,6-dichloroindophenol, phenazine methosulfate and menadione are electron acceptors, while nad, fad and o2 are inactive Registry number: EC 1.1.99.- (26 Jun 1999) |
| 4-pyridoxolactonase | <enzyme> From pseudomonas ma-1; forms 4-pyridoxic acid; involved in vitamin b6 degradation Registry number: EC 3.1.1.- (26 Jun 1999) |
| 4-sulfobenzaldehyde dehydrogenase | <enzyme> Catalyze the formation of 4-sulfobenzoate from 4-sulfobenzaldehyde; amino acid sequence given in first source Registry number: EC 1.2.1.- Synonym: p-sulfobenzaldehyde dehydrogenase, tsad protein, tsad gene product (26 Jun 1999) |
| 4-sulfobenzoate 3,4-dioxygenase | <enzyme> From comamonas testosteroni t-2; carriers out the desulfonation and dihydroxylation of 4-sulfobenzoate Registry number: EC 1.14.12.- Synonym: 4-sulphobenzoate 3,4-dioxygenase (26 Jun 1999) |
| 4-sulfobenzyl alcohol dehydrogenase | <enzyme> Catalyses the formation of 4-sulfobenzaldehyde from 4-sulfobenzyl alcohol; amino acid sequence given in first source Registry number: EC 1.1.1.- Synonym: p-sulfobenzyl alcohol dehydrogenase, tsac protein, tsac gene product (26 Jun 1999) |
| 4-thiouracil | Uracil with S replacing O in position 4, isomeric with 2-thiouracil; a rare component of transfer RNA's. (05 Mar 2000) |
| 4-toluene sulfonate methyl monooxygenase | <enzyme> From comamonas testosteroni t-2; catalyses the transformation of toluene sulfonate or p-toluate to the corresponding alcohol and the methyl side-chain to the corresponding acid in the presence of o2 and NADH; p- and m- toluates and 4-ethylbenzoate are substrates, whereas p-xylene, toluene and p-cresol are not substrates; enzyme also catalyses the demethylation of 4-methoxybenzoate to 4-hydroxybenzoate and formaldehyde; comprises reductase b and oxygenase m Registry number: EC 1.14.13.- Synonym: tsmoxygenase, tsmos, p-ts methyl-monooxygenase, tsam protein, tsab protein (26 Jun 1999) |