Results 201 to 210 of about 16,188 (237)

β-Carotene, Canthaxanthin, and Phytoene

2021
Carotenoid pigments have a recognized role in the prevention of photosensitization in photosynthetic organisms, both unicellular and multicellular. The ability of carotenoid pigments to prevent the development of tumors other than skin tumors has also been studied.
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Occurrence of dehydrosqualene (C30 phytoene) in Staphylococcus aureus

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1968
Abstract 1. 1. A mutant of Staphylococcus aureus 209 P, which had lost the ability to synthesize colored carotenoids, accumulated a phytoene-like compound. By ultraviolet, infrared, nuclear magnetic resonance and mass spectra, together with chemical analyses, the structure of this compound was established to be 2,6,10,15,19,23-hexamethyl-2, 6 ...
G, Suzue, K, Tsukada, S, Tanaka
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[26] Enzymatic synthesis of phytoene

1985
Publisher Summary This chapter focuses on enzymatic synthesis of phytoene. Enzyme systems in the chromoplasts of tomato fruits and in extracts of spinach leaves convert isopentenyl pyrophosphate to phytoene by the reactions are discussed in the chapter.
Benjamin L. Jones, John W. Porter
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The purification of phytoene dehydrogenase from Phycomyces blakesleeanus

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1994
The carotenogenic enzyme phytoene dehydrogenase has been purified from the C9carR21(-) (lycopene-accumulating) mutant of the filamentous fungus Phycomyces blakesleeanus. Solubilization of the membrane-bound enzyme with 1% Tween-60 was followed by a 250-fold purification to homogeneity using polyethylene glycol precipitation, CM-Sepharose, gel ...
P D, Fraser, P M, Bramley
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The occurrence of phytoene in various plant materials

Archives of Biochemistry and Biophysics, 1953
Abstract A method of assay for phytoene in plant materials is presented which involves isooctane-ethanol extraction, adsorption of the interfering substances on a magnesia-Super Cel column, and absorptimetric determination of phytoene at 286 mμ. Twenty plant materials were analyzed for phytoene by this method.
W J, RABOURN, F W, QUACKENBUSH
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Production of phytoene, a carotenoid, and induction of connexin 26 in transgenic mice carrying the phytoene synthase gene crtB

Biochemical and Biophysical Research Communications, 2004
Carotenoids have been recognized as chemopreventive agents against human diseases, such as cancer and cardiovascular disease. Mammalians utilize carotenoids supplied from their food since they are unable to perform the de novo synthesis of carotenoids.
Yoshiko, Satomi, Norihiko, Misawa, Takashi, Maoka, Hoyoku, Nishino   +3 more
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The stereochemistry of phytoene biosynthesis

Proceedings of the Royal Society of London. Series B. Biological Sciences, 1966
Experiments with carrot root preparations have demonstrated that all the eliminations of hydrogen at C-4 of mevalonic acid during its conversion into phytoene have the same stereospecificity; the 4- R hydrogen is retained and the 4 S hydrogen is eliminated. The same stereospecific elimination
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cis- and trans-phytoene in Verticillium agaricinum

Phytochemistry, 1973
Abstract cis -Phytoene and trans -phytofluene were identified in illuminated cultures of Verticillium agaricinum in addition to the other ...
L.R.G. Valadon, Regine Herber, J. Villoutreix, B. Maudinas   +3 more
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Genetic control of phytoene dehydrogenation in phycomyces

Plant Science Letters, 1974
Abstract Strains of Phycomyces blakesleeanus carrying mutations in gene carB accumulate large amounts of phytoene. A leaky carB mutant, isolated from a red, lycopene-producing strain, accumulates decreasing amounts of phytoene, phytofluene, ζ-carotene, neurosporene, and lycopene.
A.P. Eslava, E. Cerdá-Olmedo
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[Advances in phytoene dehydrogenase - A review].

Wei sheng wu xue bao = Acta microbiologica Sinica, 2018
Carotenoids, as a group of over 700 valuable unsaturated terpene compounds classified as carotene and xanthophyll family, are endowed with powerful nutritional value. Phytoene dehydrogenase is the key rate-limiting enzyme in carotenoids biosynthesis pathway, involved in catalyzing the conversion from colorless hydrocarbon phytoene to other pigmented ...
Chunji, Li, Bingxue, Li, Xiaori, Han
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