Results 141 to 150 of about 6,320 (164)
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A fungal phenoloxidase (tyrosinase) involved in pentachlorophenol degradation
Biotechnology Letters, 2004Amylomyces rouxii eliminated 85% of initial pentachlorophenol (PCP) at 12.5 mg l(-1) when grown with 0.1 g tyrosine l(-1), but only 55% without tyrosine. Addition of tyrosine in the culture medium increased the monophenolase activity by 1.8-fold. Tyrosinase is thus indicated to be the phenoloxidase involved in PCP degradation by A. rouxii .
A M, Montiel +5 more
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[The method of demonstrating phenoloxidase].
Acta histochemica, 1976It is reported on the evidence of phenoloxidase containing cells (=POZ) under various experimental conditions in as well spleen and small gut of white rats as small gut and skin of rabbit. A modified technic is described which gives a shortened incubation time and a regulary pigmentation of the reactive cells.
H, Schmidt, F A, Kiss
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The cuticular phenoloxidase in Drosophila virilis
Journal of Insect Physiology, 1969The cuticular phenoloxidase in the white puparia of Drosophila virilis was studied. The enzyme is firmly bound to the structure of the cuticle and could not be solubilized from the cuticle. Acetone-treated cuticular preparation oxidizes effectively hydroquinone, pyrogallol, p-aminophenol, dimethyl-p-phenylenediamine, and N-acetyldopamine.
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Effect of Bisulfite on Lobster Shell Phenoloxidase
Journal of Food Science, 1989ABSTRACT The role of bisulfite inhibition on the phenoloxidase (PO) catalyzed melanosis reaction in lobster was investigated. Bisulfite appears to inhibit melanosis by two mechanisms: (1) by reacting with intermediate quinones in the melanosis reaction, forming sulfoquinones, and (2) by irreversibly reacting with PO causing complete ...
OBDULIO J. FERRER +2 more
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A Simplified Assay for Cryptococcal Phenoloxidase
Mycologia, 1986factor (Rhodes et al., 1982). The standard procedure for assaying phenoloxidase activity described by Polacheck et al. (1982) requires extensive sample preparation. Appropriately grown cells must be broken gently by vortexing with glass beads to minimize loss of activity and the membranes collected by ultracentrifugation.
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Mycobacterium leprae and phenoloxidase activity.
Microbios, 1979Our earlier studies indicated that the enzyme o-diphenoloxidase was absent in Mycobacterium leprae separated from depromatous human tissues. At that time the bacilli were not available from any other source. The existence or absence of this enzyme in M. leprae recovered from infected armadillo tissues were reinvestigated.
S J, Kim, M, Ishaque, L, Kato
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Genetic Variants Affecting Phenoloxidase Activity in Drosophila melanogaster
Biochemical Genetics, 1997In Drosophila melanogaster, two new variants affecting the activity of phenoloxidase were found in natural populations at Gomel in Belorussia and at Krasnodar in Russia. Prophenoloxidases, A1 and A3, in these variants had the same mobilities on native electrophoresis as the wild type.
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[Substrate specificity of phenoloxidase (EC 1.14.18.1)].
Acta histochemica, 1983Using 10 microns thick cryostat-slides of spleen and gut from white rats the following substances (in 2 different concentrations) were tested as substrates for the enzyme phenoloxidase compared with dihydroxyphenylalanine: pyrogallic acid, resorcin, 2.4-dinitrophenol, tyraminhydrochloride, o-cresol, and epinephrine.
H, Schmidt, J, Koch
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Acta histochemica, 1988
Using the histochemical detection for PO the in vitro effect of several detergents was tested. Dimethylsulfoxide, Triton X 100, Sodium desoxycholate, Tween 20, and Cetyltrimethyl ammonium bromide were investigated to check their effects upon the morphology and enzymatic activity of human leucocytes.
H, Schmidt, A, Anger
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Using the histochemical detection for PO the in vitro effect of several detergents was tested. Dimethylsulfoxide, Triton X 100, Sodium desoxycholate, Tween 20, and Cetyltrimethyl ammonium bromide were investigated to check their effects upon the morphology and enzymatic activity of human leucocytes.
H, Schmidt, A, Anger
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Measurement of phenoloxidase activity
Protocol Exchange, 2007Naxin Jiang +3 more
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