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Bacterial phytase: potential application, in vivo function and regulation of its synthesis BJM
Konietzny,Ursula; Greiner,Ralf.
The stepwise release of phosphate from phytate, the major storage form of phosphate in plant seeds and pollen, is initiated by a class of enzymes that have been collectively called phytases. The classification is solely due to the in vitro capability of these enzymes to accept phytate as a substrate. Phytases have been studied intensively in recent years because of the great interest in such enzymes for reducing phytate content in animal feed and food for human consumption. They have a wide distribution in plants, microorganisms, and in some animal tissues. Due to several biological characteristics, such as substrate specificity, resistance to proteolysis and catalytic efficiency, bacterial phytases have considerable potential in commercial applications....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial phytase; Biotechnological application; Dephosphorylation; Occurrence; Phytase formation; Phytate.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000100002
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Nutrient balance of layers fed diets with different calcium levels and the inclusion of phytase and/or sodium butyrate Rev. Bras. Ciênc. Avic.
Vieira,MM; Kessler,AM; Ribeiro,AML; Silva,ICM; Kunrath,MA.
In this study, Hisex Brown layers in lay were evaluated between 40 and 44 weeks of age to evaluate the inclusion of bacterial phytase (Ph) and sodium butyrate (SB) to diets containing different calcium levels (CaL). Performance, average egg weight and eggshell percentage, in addition to nutrient metabolizability and Ca and P balance were evaluated for 28 days. Birds were distributed according to a completely randomized experimental design with a 3x2x2 factorial arrangement, with three calcium levels (2.8, 3.3, 3.8%); the addition or not of phytase (500PhU/kg) and the addition or not of sodium butyrate (20mEq/kg), composing 12 treatments with eight replicates of one bird each. There was no additive effect of phytase or SB on the evaluated responses. Feed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial phytase; Brown layers; Ca and P; Metabolizability; Organic acids.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200011
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