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Bacterial community variation in human body habitats across space and time

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Preliminary evaluation of a scheme for grading the gross morphology of the human intervertebral disc

1985) Urate and ascorbate are the dominant radical scavengers in blood plasma because the GSH concentration is only ~ 1 M Thiyl radicals react with thiolate and oxygen to switch or modulate redox properties Conjugation (addition) reactions of thiyl radicals with thiolate and oxygen Addition reactions can act as a redox switch, or to weaken the oxidizing power of thiyl radicals thiolate addition to form disulfide radical-anion (a reductant and source of superoxide) GS + GS (GSSG) (GSSG) + O2 GSSG + O2 oxygen addition to form less reactive peroxyl radical GS + O2 GSOO These reactions can be important in cells in vitro but might be less important in vivo because GS reacts with ascorbate preferentially but protein thiol groups in proximity may enhance SS bond formation (cf

3A) and a much higher tail moment value (Fig