Pheophytin a, i.e. chlorophyll a without the Mg2+ ion.
Pheophytin or phaeophytin is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem II (PS II) in plants, and the type II photosynthetic reaction center (RC P870) found in purple bacteria. In both PS II and RC P870, light drives electrons from the reaction center through pheophytin, which then passes the electrons to a quinone (QA) in RC P870 and RC P680. The overall mechanisms, roles, and purposes of the pheophytin molecules in the two transport chains are analogous to each other.
Pheophytin or phaeophytin is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem...
molecules (also named chromophores or pigments) such as chlorophyll and pheophytin, as well as quinones. The energy of the photon is used to excite an electron...
contains at least 99 cofactors: 35 chlorophyll a, 12 beta-carotene, two pheophytin, two plastoquinone, two heme, one bicarbonate, 20 lipids, the Mn 4CaO...
released. The electron transfers from pheophytin to plastoquinone (PQ), which takes 2e- (in two steps) from pheophytin, and two H+ Ions from the stroma to...
loosened electron of P680* is taken up by the primary electron acceptor, a pheophytin molecule located within photosystem II near P680. During this transfer...
electron. This electron is taken up by a modified form of chlorophyll called pheophytin, which passes the electron to a quinone molecule, starting the flow of...
polysaccharides, polyphenols, sargaquinoic acids, sargachromanol, and pheophytin were isolated from different Sargassum species. These isolated compounds...
not efficiently degraded resulting in the accumulation of the pigment pheophytin in the fruit. This pigment combined with other carotenoids in the fruit...
series of cofactors. The cofactors can be pigments (like chlorophyll, pheophytin, carotenoids), quinones, or iron-sulfur clusters. Each photosystem has...
phaeophorbide is a product of chlorophyll breakdown and a derivative of pheophytin where both the central magnesium has been removed and the phytol tail...
with the main components being chlorophyll a, chlorophyll b, pheophytin a, and pheophytin b. The high concentration of monounsaturated and polyunsaturated...
buckthorn ( Hippophae rhamnoides L.) berries during ripening and use of pheophytin a as a maturity marker". Journal of Agricultural and Food Chemistry. 57...
buckthorn (Hippophae rhamnoides L.) berries during ripening and use of pheophytin a as a maturity marker". Journal of Agricultural and Food Chemistry. 57...
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