Polyvinylpyrrolidone (PVP), also commonly called polyvidone or povidone, is a water-soluble polymer made from the monomer N-vinylpyrrolidone. As a food additive, PVP is a stabilizer. It is also used in the wine industry as a fining agent for white wine and some beers. In molecular biology, PVP can be used as a blocking agent during Southern blot analysis as a component of Denhardt’s buffer.
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