A pterin derivative that complexes with molybdenum to form the molybdenum cofactor required by several enzymes.
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mo·lyb·dop·ter·in (mə″lib-dopґtər-in) the nonmetal portion of a molybdenum cofactor; it is a pterin derivative with an aliphatic side chain that can attach to molybdenum by its two sulfhydryl groups.Medical dictionary. 2011.