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2008
Vitamin K was discovered in the 1930s during cholesterol metabolism experiments in chickens. It is a fat-soluble vitamin which occurs naturally in plants as phylloquinone (vitamin K1) and is produced by gram-negative bacteria in the human gastrointestinal tract as menaquinone (vitamin K2).
Geno J, Merli, James, Fink
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Vitamin K was discovered in the 1930s during cholesterol metabolism experiments in chickens. It is a fat-soluble vitamin which occurs naturally in plants as phylloquinone (vitamin K1) and is produced by gram-negative bacteria in the human gastrointestinal tract as menaquinone (vitamin K2).
Geno J, Merli, James, Fink
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Vitamin K1 and the vitamin K analogues
Clinical Pharmacology & Therapeutics, 1961The use of vitamin K1 and various preparations with vitamin K activity in the treatment of hypoprothrombinemic states has long been a well‐established procedure. Because the K analogues have often been popularly referred to as vitamin K, confusion has arisen regarding the relationship between these compounds and the true vitamin K. Two types of vitamin
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1966
Publisher Summary Vitamin K activity is shared by a fairly large number of compounds. They consist, in the main, of two naturally occurring groups of compounds: phylloquinones (K), containing saturated isoprenoid side chains, and menaquinones (MK) with unsaturated isoprenoid side chains.
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Publisher Summary Vitamin K activity is shared by a fairly large number of compounds. They consist, in the main, of two naturally occurring groups of compounds: phylloquinones (K), containing saturated isoprenoid side chains, and menaquinones (MK) with unsaturated isoprenoid side chains.
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