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Cytological studies on the absorptive surfaces of cestodes. VIII. Phosphohydrolase activity and cation adsorption in the tegument brush border of Hymenolepis diminuta



Cytological studies on the absorptive surfaces of cestodes. VIII. Phosphohydrolase activity and cation adsorption in the tegument brush border of Hymenolepis diminuta



Journal of Parasitology 60(5): 744-751



Hydrolysis of p-nitrophenylphosphate (pNOEP) at the tegument surface of Hymenolepis diminuta is inhibited by pretreatment of glutaraldehyde-fixed worms with chelating agents. This inhibition is largely reversible by incubating chelator-treated worms with certain divalent cations prior to pNOEPase assay. Present evidence suggests the presence of a zinc metalloenzyme, although calcium and magnesium also activate pNOEP hydrolysis.

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Accession: 000055093

Download citation: RISBibTeXText

PMID: 4372334

DOI: 10.2307/3278892


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