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Type: Artigo de periódico
Title: Extraction And Partial Characterization Of Peroxidase From Copaifera Langsdorffii Desf. Leaves [extração E Caracterização Parcial De Peroxidase De Folhas De Copaifera Langsdorffii Desf.]
Author: Maciel H.P.F.
Gouvea C.M.C.P.
Pastore G.M.
Abstract: In the literature, several processes have been described to obtain peroxidases. The purpose of this work was to obtain peroxidase from Copaifera langsdorffii leaves and characterize it partially using a factorial design of experiments and univaried tests, to confirm the results obtained by the factorial design of experiments. Peroxidase activity was measured using the guaiacol: hydrogen peroxide system. The isolated peroxidase presented 81.6% of horseradish peroxidase activity and was easy to obtain from leaves of an abundant tree distributed all over the country. Semi-purified peroxidase (COP) was precipitated with acetone 65% (v.v-1) of the crude extract, obtaining the acetone powder. The COP optimum reaction pH values were between 5.0-7.0 and the temperatures between 5 and 45°C, with a maximum activity at pH 6.0 and 35°C. The enzyme was stable in temperatures below 50°C and pH from 4.5 to 9.0 for up to 24 hours. The peroxidase was inactivated after 4 hours at 80°C and after 3 minutes at 96°C. This enzyme can possibly be used as a diagnostic reagent, biosensor and for other analytical methods in several fields of Sciences.
Rights: aberto
Identifier DOI: 
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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