Ca2+ inhibition of brush border alkaline phosphatase activity inHymenolepis diminuta |
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| Authors: | Jayne B. Hipkiss Christopher J. Branford White |
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| Affiliation: | (1) Department of Biology, Oxford Polytechnic, Headington, OX3 OBP Oxford, UK;(2) Bath College of Higher Education, Newton Park, Newton St. Loe, BA2 9BN Bath, UK |
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| Abstract: | The brush border membrane ofHymenolepis diminuta contains several Ca2+-dependent enzymes. Following our isolation of a Ca2+-dependent modulator protein we examined the kinetic properties of the brush border marker alkaline phosphatase from fractionated and crude tegument. We show that this enzyme is inhibited by Ca2+ concentrations approaching those in the calcareous corpuscles ofH. diminuta.Abbreviations CT crude tegument - FT fractionated tegument - EGTA ethylene glycol bis (amino-ethyl-ether) tetra acetic acid |
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