## Abstract The modified method for biosynthesis of L‐methionine‐^35^S and L‐cystine‐^35^S from baker's yeast (__Saccharomyces cerevisiae__) is described. The yeast was cultivated in a sulphur‐deplated medium containing carrier‐free Na~2~^35^SO~4~, under air bubbling during 24 hours. Yeast proteins
Preparation of 35S-labelled xanthates and 35S-labelled carbon disulphide by exchange reactions
✍ Scribed by J. Cífka; V. Vinš
- Publisher
- John Wiley and Sons
- Year
- 1965
- Tongue
- French
- Weight
- 326 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
The order of the exchange reaction between potassium ethyl xanthate and elemental sulphur was determined. A mixture of ethanol and toluene was used as the solvent for the routine preparation of 35S-labelled ethyl, n-butyl, n-hexyl and n-octyl xanthates at a temperature of 200 C. The dependence of the exchange rate on the presence of water was observed. The decomposition of 35s-labelled ethyl xanthate in dilute hydrochloric acid was used for the preparation of labelled carbon disulphide.
INTRODUCTION.
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