Involvement of peroxidase in enzymatic browning

... an effective involvement of pear POD in enzymatic browning. Keywords: Enzymatic browning; pear; peroxidase; polyphenol oxidase INTRODUCTION Browning of damaged tissues of fruits and vegetables during ... affinity of pear PPO for its natural substrates (Gauillard and Richard-Forget, 1997), are in agreement with an effec- tive involvement of pear POD in enzymatic...

Ngày tải lên: 18/05/2014, 20:14

... lines indicate intron 6 of 75 bp in fragments B and C, 3¢ portion of 35 bp in intron 5 in fragments C and D, and 3¢ portion of 25 bp in intron 6 in fragments F and I. The number at the right of ... results in no generation of protein isoforms. The 5¢-UTR of eukaryotic mRNA in uences the initi- ation step of protein synthesis and thereby in part determines the tran...

Ngày tải lên: 19/02/2014, 06:20

... infection. ArgII is involved in the biosynthesis of natural poly- amines (putrescine, spermidine and spermine) through conversion of l-arginine into l-ornithine [16]. The lat- ter is in turn used by ... iodide (PI) staining of apoptotic cells was quantified in VSV- infected Jurkat T cells in the absence or presence of spermine. As shown in Fig. 7, the presence of spermine d...

Ngày tải lên: 07/03/2014, 21:20

... determination of the amino-terminal amino acid sequence of purified protein was attempted, but no infor- mation was obtained, probably due to the protein modifi- cation. Therefore, the purified protein ... These results indicate that the cDNA obtained covered the entire coding region. Involvement of GTP in the regulation of TGase function In the deduced primary sequence, we found a...

Ngày tải lên: 17/03/2014, 23:20

... re- sulting from PPO activity, then accelerate anthocyanidin degradation, resulting in enzymatic browning (Fig. 1). With an increasing research effort on litchi, our under- standing of the enzymatic browning ... thylcatechol in the presence of H 2 O 2 and, thereby, form brown polyme ric pigments. This finding further supports the case for in- volvement of POD in enzymatic...

Ngày tải lên: 18/05/2014, 20:09

... polyphenolic pigmentsformed by auto-oxidation of PPO-derived quinones. A large number of interacting genetic and environmental factors influence enzymatic browning in potatoes including tuber dry matter as wellas ... resulting index ranges from 0 to 50. Indices from tubers of 50 lines were determined after in vitro propaga tionand plantinginfieldtrials in Metslawier,northernHo...

Ngày tải lên: 18/05/2014, 20:10

... 1989-JOURNAL OF FOOD SCIENCE-999 CONTROL OF ENZYMATIC BROWNING IN APPLE. . . Table 5-Inhibition of enzymatic browning in Granny Smith juice by cyclodaxtrins (CD) and combinations of CD’S with ... against browning in Red Deli- cious and Winesap plugs but induced browning in samples stored 6 or more hours (data not shown). As with CINN, in- duced browning by...

Ngày tải lên: 18/05/2014, 20:10

... MINIREVIEW Synchronization of Ca 2+ oscillations: involvement of ATP release in astrocytes Schuichi Koizumi Department of Pharmacology, Faculty of Medicine, University of Yamanashi, Japan Introduction Glia, ... astrocytic Ca 2+ transients are accentuated in pathological con- ditions, suggesting the involvement of astrocytic Ca 2+ transients in brain disorders, including...

Ngày tải lên: 16/02/2014, 09:20

... curves. (C) Bars indicate the effects of preincubation on initial rates (5 min) of thrombin generation (n = 3–5). (D) Human platelets in fibrin-depleted human plasma were preincubated with inhibitors ... examined using two structurally distinct inhibitors, wortmannin and LY294002 [21]. In the presence of ADP ⁄ P2Y 12 activity, wortmannin or LY294002 suppressed the thrombin-induced Ca...

Ngày tải lên: 18/02/2014, 16:20

... presence of kringle 5 in the structure of the protease; miniplasmin (des-kringle 1-4 plasmin) is as sensitive to fatty acids as plasmin, whereas the activity of microplasmin (des-kringle 1-5 plasmin) ... 1-4 plasmin) con- tains the kringle 5 and the catalytic domain of plas- min, whereas microplasmin (des-kringle 1-5 plasmin) is composed of the catalytic domain only [11]. At a sat...

Ngày tải lên: 18/02/2014, 17:20