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Journal of Nutrition Vol. 100 No. 2 February 1970, pp. 190-192
Copyright © 1970 by American Society for Nutrition
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Characterization of Vitamin K from the Contents of Bovine Rumen1

John T. Matschiner

Department of Biochemistry, St. Louis University School of Medicine, St. Louis, Missouri 63104

Samples of vitamin K isolated from the contents of bovine rumen were identified by chromatographic mobility, ultraviolet absorption spectra and mass spectra as menaquinones-10, 11, 12 and 13. The occurrence of these vitamins in the rumen supports the view that menaquinones-10, 11 and 12, isolated earlier from bovine liver, were bacterial in origin and were deposited in liver after intestinal absorption.

1 Supported in part by grant AM 09909 from the National Institutes of Health.

Manuscript received 29 September 1969.




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