Reduced reliance on the trace element selenium during evolution of mammals

Abstract excerpt

BACKGROUND: Selenium (Se) is an essential trace element that occurs in proteins in the form of selenocysteine (Sec). It is transported throughout the body in the form of Sec residues in Selenoprotein P (SelP), a plasma protein of unclear origin recently proposed as an experimental marker of dietary Se status. RESULTS: Here, we report that the amino-terminal domain of SelP is distantly related to ancestral...

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