Phenoloxidase activity inSimulium damnosums.l. ands. ornatums.l. following anonchocercainfection
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چکیده
منابع مشابه
Tarantula hemocyanin shows phenoloxidase activity.
An enzyme generally catalyzes one well defined reaction with high specificity and efficiency. We report here in contrast that the copper protein hemocyanin of the tarantula Eurypelma californicum exhibits two different functions. These occur at the same active site. While hemocyanin usually is an oxygen carrier, its function can be transformed totally to monophenoloxidase and o-diphenoloxidase ...
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Oxygen-transporting protein of the hemolimph of snails Helix aspersa maxima (HaH) was converted from being an oxygen carrier to a form which exhibited phenoloxidase activity by incubation with sodium dodecyl sulfate (SDS). On treatment with 1.73 mM SDS, for 3 min, significant increase of catalytic efficiency of hemocyanin towards substrate catechol (kcat/Km = 34.56 mM.min -1 versus kcat/Km = 0....
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Peroxidase isozymes from winter wheat (Triticum aestivum L. cv Orso) seedlings extracts showed phenoloxidase-like activity, becoming visible on polyacrylamide gels also in the absence of hydrogen peroxide. The results obtained after a characterization of the two activities, based on their substrate specificity, on their selective inhibition, and on the possible occurrence of artifacts, suggeste...
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In insects the enzyme phenoloxidase (PO) catalyzes melanin deposition at the wound site and around parasitoid eggs. Its proenzyme prophenoloxidase (proPO) is proteolytically cleaved to active phenoloxidase by a cascade consisting of serine proteases and inhibited by serpins. The Drosophila genome encodes 29 serpins, of which only two, Serpin-27A (Spn27A) and Necrotic, have been analyzed in deta...
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In this paper we show that we are close at the proof that the type of characteristics used by Biham and Shamir in their diierential attack on DES 3] are in fact the best characteristics we can nd for DES. Furthermore we show that the criteria for the construction of DES-like S-boxes proposed by Kim 6] are insuucient to assure resistance against diierential attacks. We show several good iterativ...
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ژورنال
عنوان ژورنال: Parasite
سال: 1994
ISSN: 1252-607X,1776-1042
DOI: 10.1051/parasite/199401s1063