One of three types of vitamin K, the other two being vitamin K1 (phylloquinone) and K3 (menadione).- Vitamin K2
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Vitamin K refers to structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements.
Vitamin K includes two natural vitamers: vitamin K1 (phylloquinone) and vitamin K2 (menaquinone).
Natural organic compound with the formula C6H42C2H(CH3).
Menadione is converted to vitamin K2 (specifically, MK-4) by the prenyltransferase action of vertebrate UBIAD1.
Series of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occurring simultaneously) and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
Bacteria use ubiquinone (Coenzyme Q, the same quinone that mitochondria use) and related quinones such as menaquinone (Vitamin K<2).
Gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants, humans and marine sponges.
The fermented beans are recognized for their contribution to a healthy gut flora and vitamin K2 intake; during this long history of widespread use, natto has not been implicated in adverse events potentially attributable to the presence of B. subtilis.
Menatetrenone (INN), also known as MK-4, is one of the nine forms of vitamin K2.
Systemic skeletal disorder characterized by low bone mass, micro-architectural deterioration of bone tissue leading to bone fragility, and consequent increase in fracture risk.
Vitamin K2 is also used as a means of treatment for osteoporosis and the polymorphisms of GGCX could explain the individual variation in the response to treatment of vitamin K.
Matrix Gla protein (MGP) is member of a family of vitamin K2 dependent, Gla-containing proteins.
Enzyme, catalyzes the reduction of nitric oxide to nitrous oxide (N2O).
The catalyzed reaction may be dependent on different participating small molecules: Cytochrome c (EC: 184.108.40.206, Nitric oxide reductase (cytochrome c)), NADPH (EC:220.127.116.11), or Menaquinone (EC:18.104.22.168).
Isochorismate synthase (EC number 22.214.171.124) is an isomerase enzyme that catalyzes the first step in the biosynthesis of vitamin K2 (menaquinone) in Escherichia coli.
In enzymology 1,4-dihydroxy-2-naphthoyl-CoA synthase is an enzyme that catalyzes the sixth step in the biosynthesis of phylloquinone and menaquinone, the two forms of vitamin K.