hydroxamic acid/potato

The reaction mechanism of an electrophoretically pure potato tuber lipoxygenase (ptLOX) was studied by EPR spectroscopy. An EPR spectrum of the 'native' ptLOX recorded at 4.5+/-0.5 K showed signals of a high-spin (pseudo) axial Fe(3+) with a g-value of approx. 6.3+/-0.1 with a shoulder at

Commercial pectin (with a 94% degree of esterification, DE94) suspended in methanol was reacted with methanolic alkaline hydroxylamine at room temperature for 20 h to prepare pectin hydroxamic acids (PHAs). The prepared PHA was coupled to the epoxy-activated Sepharose 6B gel to get immobilized PHA

5-Lipoxygenase (5-LO) (1.13.11.12) demonstrates its activity in membrane-associated state. A system in vitro with increasing quantity of mixed micelle of nonionic detergent Lubrol PX and substrate--linoleic acid (LA) was used for understanding of 5-LO catalytic activity mechanism, which depends on

We investigated the metabolism of L-lactate in mitochondria isolated from potato tubers grown and saved after harvest in the absence of any chemical agents. Immunologic analysis by western blot using goat polyclonal anti-lactate dehydrogenase showed the existence of a mitochondrial lactate

In this first comparative in vitro study, linoleyl hydroxamic acid (LHA), a simple and stable derivative of linoleic acid, was tested as an inhibitor of several enzymes involved in arachidonic acid metabolism in mammals. The tested enzymes were human recombinant 5-lipoxygenase (h5-LO), porcine

Disulfiram (tetraethylthiuram disulfide) was found to be a potent and selective inhibitor of the alternative respiratory path of plant mitochondria. The onset of inhibition by disulfiram takes several minutes and the inhibition is not readily reversed by washing, nor by metal ions. By contrast,

Seven polyketides, including four new ones named as varilactones A-B (1-2) and wortmannilactones M-N (3-4), as well as three biogenetically related known wortmannilactones E, F and H (5-7), were isolated from the fungus Penicillium variabile HXQ-H-1, cultivated in potato-based medium with the

The role of different growth media and chemical enhancer on synthesis of secondary metabolites Cladosporium resinae (NRL-6437) was investigated for their in vitro biological activities. Cladosporium resinae (NRL-6437) were grown in various nutrient media (Czapeak-dox Broth (CB), Czapeak

A systematic investigation of the metabolites of Alternaria brassicicola produced under various culture conditions is reported. The phytotoxin brassicicolin A is produced in significantly larger amounts in potato dextrose broth than in minimal medium cultures. In general an increase in the

An EPR investigation of the region of the higher plant respiratory chain involving ubiquinone and Center S-3 of succinate dehydrogenase is reported. At temperatures close to those of liquid helium, first derivative spectra corresponding to Center S-3 (gmax = 2.017) and a signal split around g = 2.00

In an attempt to explore the biosynthetic potential of endosymbiotic fungi, the secondary metabolite profiles of the endophytic fungus, Anteaglonium sp. FL0768, cultured under a variety of conditions were investigated. In potato dextrose broth (PDB) medium, Anteaglonium sp. FL0768