Lycopersene and Prelycopersene Pyrophosphate
نویسندگان
چکیده
منابع مشابه
Dissociation of prelycopersene pyrophosphate synthetase from phytoene synthetase complex of tomato fruit plastids.
The partially purified phytoene synthetase enzyme complex obtained from tomato fruit plastids dissociates into two or more subunit species on chromatography in low ionic strength buffer on DEAE-cellulose. One of these subunits prelycopersene pyrophosphate synthetase, has a molecular weight of approximately 40,000, whereas the phytoene synthetase complex has a molecular weight of 200,000. The pr...
متن کاملAttempts to detect lycopersene formation in yeast.
1. beta-Ionone vapour has been shown to cause an increase in the more saturated carotenes and a decrease in the less saturated carotenes of Rhodotorula glutinis. Lycopersene (dihydrophytoene) has been proposed as a precursor to phytoene. Attempts were made to isolate lycopersene from beta-ionone-treated cultures of R. glutinis. 2. Large samples of beta-ionone-treated cultures were examined for ...
متن کاملCardiac Scintigraphy with Thallium-201 and Technetium Pyrophosphate
myocardial Scintigraphy ischemia can deor mc_mstrat_e mfarction. and It has a higrs after onset of an mfarctl has a higrs after onset of an mfarctln and localizeh sensitivity in the first six to.twenty can belabelled pyrophosphate scan becomes four. houuseful in the coronary care umt. The positive trction. Since the pyrophosphate scan 99mTc welve to twenty hours after onset of an becomes infa...
متن کاملStudies in carotenogenesis. 30. The problem of lycopersene formation in Neurospora crassa.
There is evidence that the first tetraterpene formed in carotenoid biosynthesis is not lycopersene, the C40 analogue of squalene, but phytoene (15,15'-dehydrolycopersene). Davies, Goodwin & Mercer (1961) failed to find lycopersene in any carotenogenic system they examined, and it was suggested that lycopersene plays no part in carotenoid biosynthesis (Davies, 1961, 1962; Goodwin, 1961). Mercer,...
متن کاملIsoprenoid enzyme systems of silkworm. I. Partial purification of isopentenyl pyrophosphate isomerase, farnesyl pyrophosphate synthetase, and geranylgeranyl pyrophosphate synthetase.
Isopentenyl pyrophosphate isomerase, farnesyl pyrophosphate synthetase, and geranylgeranyl pyrophosphate synthetase were detected in cell-free extracts of Bombyx mori and were partially purified by hydroxyapatite and Sephadex G-100 chromatography. Two forms of farnesyl pyrophosphate synthetase were chromatographically separated. They were designated as farnesyl pyrophosphate synthetases I and I...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1972
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)44751-0