Two methods are presented for determining the catalytic activity of aryl and alcohol sulfotransferases. The first assay is a simple and rapid procedure that is based on the extraction of a paired ion formed between the product organic sulfate and methylene blue. The second method employs HPLC analysis of the substrate-dependent formation of PAP, an assay that is particularly useful when the sulfuric acid ester product is chemically unstable.
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Sheng et al. (2001) studied this question.
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