Cell extracts from car mutants of Phycomyces blakesleeanus, which can convert '4C—labelled mevalonic acid into unsaturated carotenes, were treated with high ionic strength buffer and a range of detergents in an attempt to solubilise the carotenogenic enzymes. Phytoene synthetase was dislodged from the membrane with high molarity Tris-HC1 buffer, but the enzymes which convert phytoene into s—car...

1. The occurrence of a novel series of triterpenoid carotenes in Streptococcus faecium UNH 564P is reported. 2. This series, which comprises the C(30) analogues of phytoene, phytofluene, zeta-carotene, 7,8,11,12-tetrahydrolycopene and neurosporene, appears to be analogous to the C(40) Porter-Lincoln series and a pathway of triterpenoid carotene dehydrogenation is proposed to account for the for...

In this work, black and white Myrtus communis L. (myrtle) fruits some biochemical parameters were investigated such as vitamins, carotenes, functional peptides, oxidative stress markers (OSM), total phenolic (TP) flavonoid (TF) substances, antioxidant capacity (AC) amino acids contents. The myrtle had generally higher amounts of TP, AC acid (AA) contents than the fruits. dried in sun light micr...

BACKGROUND/OBJECTIVES A pivotal role of oxidative stress has been emphasized in the pathogenesis as well as in the disease progression of Parkinson's disease (PD). We aimed at investigating serum levels of antioxidant vitamins and elucidating whether they could be associated with the pathogenesis and progression of PD. MATERIALS/METHODS Serum levels of retinol, α- and γ-tocopherols, α- and β-...