Negative Ion Fragmentation of Cysteic Acid Containing Peptides: Cysteic Acid as a Fixed Negative Charge

Chromatographic determination of cystine as cysteic acid.

Observations on cysteic acid decarboxylase.

On the Determination of Cystine as Cysteic Acid

In the procedure of Schram, Moore, and Bigwood (1) for the determination of the cystine plus cysteine content of a protein, the directions for the concentration of the reaction mixture need to be followed explicitly in order to avoid overoxidation. The addition of a reducing agent to destroy the excess performic acid before the concentration step would seem appropriate if the reductant would ha...

Decomposition of Cysteic Acid and Taurine by Soil Micro - organisms

Streptomycetes and aerobic bacteria able to utilize cysteic acid and taurine as sole sources of energy, nitrogen and sulphur were isolated from soil materials. None of the isolated fungi did this. The bacterium which was used in most experiments grew on both compounds. The sulphur of the compounds was recovered as sulphate and most of the nitrogen as ammonia after breakdown by growing or pregro...

Biochemical transformations as determined by competitive analogue-metabolite growth inhibitions; prevention of pantothenic acid synthesis by cysteic acid.

The study of the metabolism of cells by a method termed inhibition analysis (l-3) led to the initial proposal that the antibacterial index (4) is a function of the inhibited enzyme system which becomes the limiting factor for growth of the organism. It was further proposed that if the product of this enzyme system is supplied to the organism the analogue either becomes ineffective as a growth i...