Abstract
Membrane vesicles prepared from the midguts of Philosamia cynthia larvae (Lepidoptera) show a concentrative uptake of phenylalanine in the presence of salt gradients. Unlike mammalian intestines, the highest accumulation of the amino acid occurs with a potassium salt gradient. Glucose is very poorly permeable across the vesicles.
MeSH terms
-
Animals
-
Biological Transport / drug effects
-
Cell Membrane / drug effects
-
Cell Membrane / metabolism
-
Cell Membrane / ultrastructure
-
Digestive System / metabolism*
-
Glucose / metabolism
-
Intestinal Absorption / drug effects*
-
Larva / metabolism
-
Lepidoptera / metabolism*
-
Phenylalanine / metabolism*
-
Potassium / pharmacology*
Substances
-
Phenylalanine
-
Glucose
-
Potassium