Membrane transport of inositol by Hymenolepis diminuta (Cestoda).
J Parasitol
; 68(1): 53-60, 1982 Feb.
Article
em En
| MEDLINE
| ID: mdl-7077449
ABSTRACT
The absorption of myoinositol by Hymenolepis diminuta involved diffusion that occurred at all substrate concentrations tested; at low substrate concentrations the mediated component predominated. The mediated process exhibited saturation kinetics with a Vmax and Kt of 0.011 mumoles/g of the ethanol-extracted dry wt/4 min and 0.0067 mM, respectively. Myoinositol transport was sensitive to changes in temperature, pH, and sodium ion concentration. D-Glucose was a noncompetitive inhibitor of myoinositol transport, but myoinositol had no effect on D-glucose absorption. Phlorizin interacted competitively with the myoinositol transport system. Various sugar alcohols and amino acids had no effect on myoinositol transport. These results indicate that a separate transport system exists in H. diminuta for myoinositol.
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Base de dados:
MEDLINE
Assunto principal:
Hymenolepis
/
Inositol
Limite:
Animals
Idioma:
En
Revista:
J Parasitol
Ano de publicação:
1982
Tipo de documento:
Article