Vitamin K epoxide reductase: Evidence that Vitamin K dihydroquinone is a product of Vitamin K epoxide reduction

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Abstract

Vitamin K epoxide reductase is a two component enzyme activity which catalyzes the reduction of Vitamin K epoxide using dithiothreitol as either a primary or secondary source of reducing equivalents. A high performance liquid chromatographic assay system indicates that in addition to the quinone, the dihydroquinone form of Vitamin K is a reaction product. Carboxymethyl cellulose chromatography suggests that the same cytosolic protein fraction may be involved in the dithiothreitol-supported reduction of Vitamin K epoxide, the dithiothreitol-supported reduction of Vitamin K quinone and the NADH-supported reduction of dichlorophenol-indophenol. © 1981.

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Sherman, P. A., & Sander, E. G. (1981). Vitamin K epoxide reductase: Evidence that Vitamin K dihydroquinone is a product of Vitamin K epoxide reduction. Biochemical and Biophysical Research Communications, 103(3), 997–1005. https://doi.org/10.1016/0006-291X(81)90908-6

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