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Synthetic LKE is readily hydrolyzed to LK by general esterase activity. Synthetic LKE was treated with porcine esterase as described in Results and analyzed with HPLC with ultraviolet-visible spectrophotometry (UV/Vis) detection to determine whether the enzyme could hydrolyze the compound to yield LK. A peak corresponding to the retention time and UV/Vis characteristics of authentic LK was observed in esterase-treated LKE solutions. au, Arbitrary units.
