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Spectrophotometric quantitation of antioxidant capacity through the formation of a phosphomolybdenum complex: specific application to the determination of vitamin E.
The phosphomolybdenum method is routinely applied in the laboratory to evaluate the total antioxidant capacity of plant extracts and to determine vitamin E in a variety of grains and seeds, including corn and soybean.
Roselle (Hibiscus sabdariffa) seed oil is a rich source of gamma-tocopherol.
The global characteristics of roselle seed oil suggest that it could have important industrial applications, adding to the traditional use of roselsle sepals in the elaboration of karkade tea.
Roselle (Hibiscus sabdariffa) Seed Oil Is a Rich Source of γ-Tocopherol
: The antioxidant potential of roselle (Hibiscus sabdariffa L.) extracts was studied. Different plant organs, including seeds, stems, leaves, and sepals, were analyzed with respect to their…
Allantoate amidinohydrolase (Allantoicase) from Chlamydomonas reinhardtii: its purification and catalytic and molecular characterization.
- P. Piedras, A. Muñoz, M. Aguilar, M. Pineda
- Biology, ChemistryArchives of biochemistry and biophysics
- 15 June 2000
The effect of group-specific reagents suggest that the amino acids histidine, tyrosine, and cysteine are essentials for the allantoicase activity with both substrates.
Antioxidant capacity of extracts from wild and crop plants of the Mediterranean region.
These Mediterranean plant species could be used as a very good source of both water-soluble and lipid- soluble antioxidants, particularly alpha-tocopherol, particularly Holm oak and olive tree leaves showed the highest yields.
Urea is a product of ureidoglycolate degradation in chickpea. Purification and characterization of the ureidoglycolate urea-lyase.
A ureidoglycolate-degrading activity was analyzed in different organs of chickpea, for the first time that such an activity is detected in plant tissues, and it is suggested that the enzyme is a metalloprotein.
Cloning, characterization and mRNA expression analysis of PVAS1, a type I asparagine synthetase gene from Phaseolus vulgaris
The PVAS1 protein showed the highest similarity to soybean SAS1, and piled up with other legume ASs to form an independent dendritic group of type-I AS enzymes, suggesting different functions for these two AS genes.
RT-PCR cloning, characterization and mRNA expression analysis of a cDNA encoding a type II asparagine synthetase in common bean.
Three genes showing distinct regulatory patterns encode the asparagine synthetase of sunflower (Helianthus annuus).
- M. B. Herrera-Rodríguez, S. Carrasco-Ballesteros, J. Maldonado, M. Pineda, M. Aguilar, R. Pérez-Vicente
- BiologyThe New phytologist
- 1 July 2002
Asparagine synthetase from sunflower is encoded by a small gene family whose members have achieved a significant degree of specialization to cope with the major situations requiring asparagine synthesis.