title: Effect of cations on intestinal nutrient transport in two teleosts.
abstract: The uptake of sugar and amino acids was affected by the presence of cations in the filling solution in both the fishes, Ophiocephalus and Heteropneustes. Under low Na+ concentration, the rate of transport decreased while an increase in Na+ concentration brought about its corresponding increase in both the fishes. Li+ was able to substitute Na+ to some extent in the filling solution in the transport of xylose, glycine and leucine. The replacement of Na+ by Li+ was more successful in xylose transport, in contrast to the transport of glycine and leucine. On the other hand, K+ was not able to substitute Na+ in the transport process. K+ inhibited the transport of glycine but did not that of xylose and leucine.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D005399:Fishes / Q000378:metabolism*; D005998:Glycine / Q000378:metabolism; D007421:Intestine, Small / Q000378:metabolism*; D007930:Leucine / Q000378:metabolism; D008094:Lithium / Q000494:pharmacology*; D011188:Potassium / Q000494:pharmacology*; D012964:Sodium / Q000494:pharmacology*; D014994:Xylose / Q000378:metabolism
chemical_list: D008094:Lithium; D012964:Sodium; D014994:Xylose; D007930:Leucine; D011188:Potassium; D005998:Glycine