Maintaining tissue selenium species distribution as a potential defense mechanism against methylmercury toxicity in juvenile white sturgeon (Acipenser transmontanus)

•MeHg exposure mobilized endogenous Se from storage.•Co-exposure to MeHg increased de novo synthesis of biologically active Se forms in most tissues.•MeHg exposure resulted in transformation of the exogenous SeMet in the liver.•Selenocompound distribution in the kidneys was not affected by the expos...

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