Hyoscyamine 6 beta-hydroxylase, a 2-oxoglutarate-dependent dioxygenase that catalyzes the hydroxylation of l-hyoscyamine to 6 beta-hydroxyhyoscyamine in the biosynthetic pathway leading to scopolamine [Hashimoto, T. & Yamada, Y. (1986) Plant Physiol. 81, 619-625] was purified 310-fold from root
Hyoscyamine is epoxidized to scopolamine via 6beta-hydroxyhyoscyamine in several solanaceous plants. 6,7-Dehydrohyoscyamine has been proposed to be an intermediate in the conversion of 6beta-hydroxyhyoscyamine to scopolamine on the basis of the observation that this unsaturated alkaloid is converted
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