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For the IL-21R, the WSXWS has been shown to be mannosylated at the first tryptophan where the sugar chain appears to form structurally important interactions that bridge the two fibronectin domains (4, 5)

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The optimal dose of rhodiola extract for long-term use was 100–170 mg per day, and the rosavin content of the extract should be 3.6–6.14 mg per weight of the extract

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