How to estimate the dithiothreitol (DTT) concentration in purified protein (HPV antigen)?
ProFoldin sells a kit for the determination of DTT in biological samples.
You can use Ellman's reagent (5,5'-dithio-bis-[2-nitrobenzoic acid]) to measure the concentration of thiols, by comparison to a standard curve made with DTT. The absorbance at 412 nm is measured.
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