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The zeaxanthin-rich extracts influence on intracellular transcription factor NF-kβ p65 is depicted by flow-cytometry generated histograms of normal BJ (a) and malignant A375 cells (b) subjected to a 24-h treatment; from left to right: untreated cells, treatment with 50 μM 1 and 2. (c) The dose-response relationship between the quantity of zeaxanthin added to the cells and the concentration of the soluble NF-kβ p65 secreted within 24 h.
