>As suggested by Bioreba we use polyvinylpyrrolidone in extraction and
>conjugate buffers when carrying out ELISA for detection of virus in
>plant sap. I would be grateful if someone could enlighten me as to why
> it is used . Is its action as a blocker or as an antioxidant or does it have
>some other function?
>I believe it's used as a blocking agent in your assay. It is a hydrophilic
polymer that is a wetting agent, and probably reduces the nonspecific
binding to plastic in microtiter plates.
cliu at ic.net
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