Antioxidant enzyme-producing bacteria

All selenium-containing proteins and enzymes in animals, microorganisms and plants incorporate selenocysteine non-specifically105 or as part of Se-dependent antioxidant enzymes such as glutathione peroxidase, (EC 1.11.1.9) which has a Se-cysteine residue in its active site.116 120 An active form of Se, selenophosphate, is produced by selenophosphate synthetase in several bacteria. This active form is required for the production of Secys-tRNA, a precursor for Se-cysteine.121 In a similar vein, a Se-containing modified-tRNA nucleoside, 5-methylaminomethyl-2-selenouridine, encodes a selenouridine synthase which replaces sulfur in tRNA with selenium.122... 

Concentrations of vitamins Bj, B2, Bg, B12, and C increase during kombucha fermentation (Bauer-Petrovska and Petrushevska-Tozi 2000 Jayabalan et al. 2014 Malbasa et al. 2011 Vitas et al. 2013), as well as the antioxidant activity and the phenol content of the tea. This change may be attributed to enzymes produced by the bacteria and/or yeasts present (Chu and Chen 2006 Jayabalan et al. 2014). 

Nowadays a wide variety of food ingredients are already produced in an encapsulated form. These comprise artificial sweeteners (aspartame), flavouring agents such as oils or spices (with desirable flavour but possibly undesirable odour), natural colorants (e.g., p-carotene, turmeric), preservatives, acids (citric, lactic and ascorbic), bases, buffers, enzymes, lactic acid bacteria, and some antioxidants (Kirby, 1991 Gibbs et al, 1999 Chen et al, 2006b Ubbink and Kruger, 2006 Augustin and He-... 

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