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Xenobiotica
the fate of foreign compounds in biological systems
Volume 10, 1980 - Issue 11
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Research Article

The fate of S-propylcysteine in the rat

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Pages 827-834 | Received 10 Apr 1980, Published online: 22 Sep 2008
 

Abstract

1. The metabolism of S-propylcysteine in the rat has been re-investigated. The previously known major metabolite has been isolated and identified as the mercapturic acid, N-acetyl-S-propylcysteine.

2. Several further metabolites have been isolated from the urine of rats treated with S-propyl[35S]cysteine. These have been identified as S-propylcysteine-S-oxide, N-acetyl-S-(2-hydroxypropyl)cysteine, S-(propylthio)lactate, S-(2,3-dihydroxypropyl)cysteine and N-acetyl-S-(2-carboxyethyl)cysteine.

3. The metabolism of S-(2-hydroxypropyl)-, S-(3-hydroxypropyl)- and S-(2,3-dihydroxypropyl)[35S]cysteine have been investigated in the rat. The results, integrated with those from the metabolism of S-propyl[35S]cysteine, have enabled the pathways of S-propylcysteine to be deduced.

4. The oxidative metabolism of a number of S-alkyl cysteines is discussed.

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