menaquinone


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menaquinone

 [men″ah-kwin´ōn]
any of a series of compounds having vitamin K activity, in which the phytyl side chain of phytonadione (vitamin K1) is replaced by a side chain of prenyl units.

menaquinone

(mĕn′ə-kwĭ-nōn′, -kwĭn′ōn′)
References in periodicals archive ?
Vermeer, "The role of menaquinones (vitamin K2) in human health," British Journal of Nutrition, vol.
[35] 2015 3 years 180 [micro]g menaquinone Vossen et al.
Vitamin K Vitamin K is a Required for the (naphthoquinone) quinone compound in formation of the human body in a prothrombin (an storage form as essential component menaquinone (MK); of blood clotting).
[3] Nonstandard abbreviations: SPE, solid-phase extraction; CRP, C-reactive protein; EQA, External Quality Assurance; MK6, menaquinone 6.
The vitamin exists in two forms in nature: phylloquinone (K1), found in green vegetables, and menaquinone, ([K.sub.2]), produced by microbes in the lower digestive tract of animals, including pigs and humans.
Vitamin K comprises three main forms: vitamin K1 or phylloquinone which is found in green plants; vitamin K2 or the menaquinone family which is synthesised by bacteria in the large intes tine; and vitamin K3 or menadione which is a synthetic, water-soluble form that has been utilised in animal feeds.
Vitamin K exists as vitamin Kl (phylloquinone), which is abundant in many vegetables; vitamin K2 (menaquinone), which the body produces in the digestive tract and which is provided by some animal products; and vitamin K3, the synthetic form known as menadione.
The first and only vitamin K2 to deliver a gamut of menaquinone isomers, MenaQ7 Full Spectrum is naturally fermented using chickpea protein, offering an all-trans vitamin K2 that is free from gluten, soy and all known allergens, and is suitable for vegans and vegetarians.
Second, that halocyanin carries electrons from complex III to complex IV rather than menaquinone. Finally, that ATP synthase has a stoichiometry of 10 protons per ATP, which is much higher than in most organisms.
Geleijnse et al., “Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam Study” Journal of Nutrition 134(11):3100-3105 (2004).
Kroppenstedt, "Fatty acid and menaquinone analysis of actinomycetes and related organisms," in Chemical Methods in Bacterial Systematics, M.