A crude enzyme extract from Dioscorea esculenta var. fasiculata tissue subjected to ion exchange chromatography on DEAE-Sephadex A-50 column. This procedure resolved the extract into two main protein peaks one of which eluted through the column relatively unbound while the other protein peak which remained bound to the column was eluted with 1.0 M NaCl. Both protein peaks contained polyphenol o...

Ribulose-1,5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39) was crystallized from a heterozygous tobacco (Nicotiana tabacum L.) aurea mutant (Su/su), its wild-type sibling (su/su), and green revertant plants regenerated from green spots found on leaves of haploid Su plants. No differences were found in the specific activity or kinetic parameters of this enzyme, when comparing Su/su and su/su ...

Hydrogenperoxide (H(2)O(2)) is an end product of diamine and polyamine oxidation by their respective oxidase enzymes. A new sensitive assay method is based on a H(2)O(2)-titanium (Ti) complex formation as an indicator of H(2)O(2) production due to polyamine oxidation. The orange-yellow coloured H(2)O(2)-Ti complex was measured at 410 nm in a Shimadzu spectrophotometer. The assay conditions for ...

High Quality Antibodies, FISH probes and Kits.Join Memeber Online Order TutorialA Simple Method for Assaying Total Protein, Polyphenol Oxidase and. Several assay procedures have been described for PPO and POD from lychee. PPO.Polyphenoloxidase Activity. The enzyme polyphenoloxidase or tyrosiuase, studying its. Zyme preparation and the general assay procedure.Polyphenol Oxidase Assay. The latter...

It is shown that bacteria Bradyrhizobium japonicum 273 were capable of degrading phenol at moderate concentrations either in a free cell culture or by immobilized cells on granulated activated carbon particles. The amount degraded was greater an preparation than culture. application constant electric field during cultivation led to enhanced biodegradation and carbon. highest removal efficiency ...

AIM The aim of our work was to assess qualitatively and quantatively emotional deficits in patients diagnosed with schizophrenia following ICD-10 criteria in early and late stages of the schizophrenic process and the evaluation of the relationship between genes polymorphism of enzymes influencing dopaminergic, serotoninergic, and noradrenergic transfer and emotional functioning of the examined ...

Tyrosinases, bifunctional metalloenzymes, catalyze the oxidation of monophenols and o-diphenols to o-quinones, the precursor compounds of the brown-coloured pigment melanin. In eukaryotic organisms, tyrosinases are expressed as latent zymogens that have to be proteolytically cleaved in order to form highly active enzymes. This activation mechanism, known as the tyrosinase maturation process, ha...

Exposure of root tissue from a susceptible variety of sweet potato to low concentrations of ethylene induced a resistance to infection by Ceratocystis fimbriata and an increase in the activity of peroxidase and polyphenoloxidase in the tissue. Susceptible tissue that was inoculated with a pathogenic strain of C. fimbriata or a nonpathogenic strain that can induce resistance liberated more ethyl...