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Chronic niacin deficiency leads to pellagra, a condition now rare in developed countries due to its association with poor nutrition, resulting from low intake of niacin or tryptophan (54)

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Transfection, BSO treatment, and exposure of AQ-QI and DEAQ-QI were identical as described in section Transient Transfection of Human GSTP1 Gene and Cell Viability Assay. After exposure the medium was gently removed and the later steps were conducted according to manufacturers manual

Conflict of interest The authors have no conflict of interest to declare.

Buckel W, Kratky C, Golding BT