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Digestive processes of hematophagous insects part 10 effects of mammalian sera upon 2 trypsins from female horse flies and deer flies diptera tabanidae



Digestive processes of hematophagous insects part 10 effects of mammalian sera upon 2 trypsins from female horse flies and deer flies diptera tabanidae



Journal of Medical Entomology 14(1): 23-28



Trypsins from tabanids were partially purified by Sephadex gel filtration and DEAE-cellulose chromatography at pH 7.0. The effects of sera from cow, dog, horse, man, pig, rabbit and sheep upon these trypsins were determined. Trypsins [from Crysops excitans Walker, C. frigidus Osten Sacken, C. furcatus Walker, Haematopota americana Osten Sacken, Hybomitra affinis (Kirby), H. frontalis (Walker) H. lasiophthalma (Macquart), H. nuda (McDunnough) and H. pediontis (McAlpine)] eluted from DEAE-cellulose by 0.1 M or 0.2 M KCl were inhibited by mammalian sera. Trypsins (from C. excitans, C. frigidus, H. frontalis, H. lasiophthalma, H. nuda and H. pediontis) eluted from DEAE-cellulose by 0.3 M or 0.4 M KCl were activated by mammalian sera. The effects of cow serum upon trypsin (from C. frigidus, H. lasiophthalma and H. nuda) depend upon the stage of purification of the trypsin. A trypsin activator was found in the midgut of C. frigidus and H. nuda.

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Accession: 005161744

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Related references

Digestive processes of hematophagous insects. X. Effects of mammalian sera upon two trypsins from female horse flies and deer flies (Diptera: tabanidae). Journal of Medical Entomology 14(1): 23-28, 1977

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