1. The transport of @entity10546 ( @entity46850 ) in lamprey and @entity7136 erythrocytes was studied. 2. In lamprey erythrocytes the half-time for the equilibration of @entity46850 was fast, approx. 8 min. In contrast, the erythrocytes of @entity7136 were almost impermeable to @entity46850 , with a half-time for equilibration of 14.2 hr. 3. @entity46850 was taken up by lamprey erythrocytes both by facilitated diffusion and simple diffusion. The presence of carrier-mediated transport was indicated by saturation kinetics and by inhibition by @entity16802 . The Km and Vm of the saturable component of @entity46850 transport were 1.6 mmol/l and 12.4 mmol/kg packed cells/hr. 4. Since the @entity46850 transport in @entity7136 erythrocytes showed no sign of saturation kinetics, it appears to proceed by simple diffusion only. 5. These results suggest that, as for most other teleost fish so far studied, low @entity413 permeability is insufficient to maintain normal energy metabolism in @entity7136 erythrocytes. In contrast, in agnathans facilitated @entity413 transport seems to be quite effective.

@entity413 permeability in river lamprey (Lampetra fluviatilis) and @entity7136 ( XXXX ) erythrocytes.

@entity10546 :: ('MESH:D019325', 'Chemical') :: ['3-O-methyl-D-glucose'] @entity16802 :: ('MESH:D010693', 'Chemical') :: ['phloretin'] @entity46850 :: ('CHEBI:70867', 'Chemical') :: ['3-OMG'] @entity7136 :: ('7962', 'Species') :: ['carp'] @entity413 :: ('MESH:D005947', 'Chemical') :: ['glucose']
@entity7136 :: (7962,Species) :: ['Cyprinus carpio']
