The radical found in phylloquinone (vitamin K1); a tetraprenyl radical, reduced in three of four prenyl groups.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Kamiya, "Effect of phytyl side chain of vitamin E on its antioxidant activity," The Journal of Biological Chemistry, vol.
Moreover, TRF possesses a special conformation in the membrane of phospholipid bilayer due to its unsaturated phytyl tail [22].
Both tocopherols and tocotrienols (T3) belong to the family vitamin E, with each of them comprising four homologs ([alpha], [beta], [gamma], and [delta]); they differ structurally in that tocopherols contain a saturated phytyl chain whereas tocotrienols possess an unsaturated isoprenoid side chain attached to 2-position on the chroman ring (Sen et al., 2006) (Fig.
(15) V[K.sub.1]'s substituent is a phytyl chain on the 3' position, is mainly found in plants and is involved with photosynthesis.
Chlorophyllin is a sodium-copper salt derivative of chlorophyll where the central nucleus of magnesium is substituted by another metal such as copper, iron or cobalt and where the phytyl and methyl ester groups are substituted by sodium or potassium (SARKAR et al., 1994), converting it into water soluble.
Tocopherols have a longer tail without double bonds (phytyl), causing them to be stationary and consequently protect a more confined surface area of the cell membrane.
It is known that gamma-tocopherol inhibits human prostate cancer cell proliferation via down-regulation of cyclin-related signaling but tocopherol and tocotrienol metabolites with a shortened phytyl chain, carboxyethyl hydroxychromans, were not previously investigated as anti-proliferative agents.