. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NA+ AND GLUCOSE FLUXES IN HYMENOLEPIS 153 In the absence of external Na+, glucose influx in H. diminuta as a function of glucose concentration appeared saturable, with an approximate pGmax and Kt of /Ainoles/g ethanol extracted dry wt/2 min and mM, respectively. The inhibition of mM 14C-glucose influx by unlabeled glucose indicated that at least of the glucose influx in Na+-free media was mediated. 8r. 0 30 60 90 Time (sec) 120 FIGURE 6. Fluxes of 5 HIM 14C-glucose (J'G = Atmoles absorbed/g ethanol extracted dry
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NA+ AND GLUCOSE FLUXES IN HYMENOLEPIS 153 In the absence of external Na+, glucose influx in H. diminuta as a function of glucose concentration appeared saturable, with an approximate pGmax and Kt of /Ainoles/g ethanol extracted dry wt/2 min and mM, respectively. The inhibition of mM 14C-glucose influx by unlabeled glucose indicated that at least of the glucose influx in Na+-free media was mediated. 8r. 0 30 60 90 Time (sec) 120 FIGURE 6. Fluxes of 5 HIM 14C-glucose (J'G = Atmoles absorbed/g ethanol extracted dry wt, left ordinate) and 25 meq/1 ~Na (J'sa — /^equivalents absorbed/g ethanol extracted dry wt, right ordinate) into Hymenolepis dimimtta as a function of time; J'G = solid circles, J'xa = solid squares. Delected Na+ was replaced with tris. Each point is the mean of 3 replicates. The above observations suggested that further studies of the mediated influx of 14C-glucose in the absence of Na+, and of the mediated portion of 22Na+ movement in the absence of glucose, were desirable. The glycoside phlorizin was a competitive inhibitor of 14C-glucose influx in H. diminuta (Fig. 10). In the absence of external Na+, phlorizin abolished over 70% of the residual 14-C- glucose influx suggesting that the same glucose transport system was involved in the pres- ence and absence of external Na+. On the other hand, phlorizin had no effect on. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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